<!doctype html>
<html>
<head>
<title>Tracing Square Line Drawing - RJM Programming - December, 2018 ... Thanks to https://medium.com/@dear_trudence/how-to-draw-vertical-and-diagonal-lines-with-html-and-css-9e8d7d9c59b2 and https://stackoverflow.com/questions/45693587/only-part-of-border-changes-the-color and https://stackoverflow.com/questions/16795548/rotate-and-translate and https://stackoverflow.com/questions/8672369/how-to-draw-a-line-between-two-divs</title>
<style>
td.square {
width: 100px;
height: 100px;
}

hr {
height: 4px;
border: 2px solid black;
background: linear-gradient(to right, yellow 80%, rgba(255,0,0,1) 20%);
border-radius: 5px;
}

hr.diagonal {
transform: rotate(45deg);
width: 144px;
}

hr.vertical {
transform: rotate(90deg) translateY(50px) translateX(50px) ;
width: 100px;
border-radius: 5px;
z-index: 1;
}

div.vertical {
width: 4px;
height: 100px;
z-index: 12;
border: 2px solid black;
border-radius: 5px;
background: linear-gradient(to left, yellow 80%, rgba(255,0,0,1) 20%);
}

span::after {
content:'\000031\0020e3';
}

span.vertex:not(.nocont)::after {
content:'\000031\0020e3';
}

hr.vertex {
height: 4px;
width: 4px;
color: purple;
background-color: purple;
background: linear-gradient(to right, purple 80%, purple 20%);
border-radius: 5px;
z-index: 25;
}

#qh4 {
font-size: 12px;
}

input {
border-radius: 23px;
}

.face {
border-radius: 150px;
}

iframe {
z-index: 29;
}
</style>

<script type='text/javascript'>

var lastsquare=-1;
var tprefix='data-';
if (document.URL.indexOf('debug=') != -1) { tprefix=''; }
var isIE = (navigator.appName == 'Microsoft Internet Explorer' || (navigator.appName == "Netscape" && navigator.appVersion.indexOf('Edge') > -1));
var vertices_in_a_row=0, viar_left=[0.0,0.0], viar_top=[0.0,0.0];
var squares=[], lines=[], vertices=[];
var thisrect, hrcnt=0;
var lastdel=null, hro, v1=null, v2=null, onld=true;
var dval='', wording='';
var aurl='', burl='';
var inas=[], jinas=0;
var inanswer='';
var haveclickedvertex=false;
var vstr=';';
var score=0, goes=0, sqchoice=0, sqorig='';
var bpointsx=[];
var bpointsy=[];

var inquestions=["",
"10,22,23,9,70,126,128,139,150,149,93,36,82,138,-82,+25,+37,-138,+95,+37",
"126,70,9,10,22,34,35,93,149,150,139,127,83,82,24,-24,+140,+196,-82,+173,+185",
"70,72,71,180.124,+72,-61,-73,+285,-7,-68",
"9,10,11,12,70,71,72,24,82,83,-70,+7,+68,-72,80,+136",
"12,24,36,73.4,17.4,29.17,84.29,-287,+95,+29,-12,+84,+17",
"70,71,82,72,83,12,24,20.7,61.7,73.7,84.20,-285,+73,+20",
"11,12,70,126,128,139,150,149,94,83,127,71,82,23,22,-150,+117,+129,-149,+73,+84,-94,+140,+196",
"11,35,22,34,24,36,73.4,13.4,124.73,136.73,147.95,158.95,41.37,-285,+95,+41",
"11,35,22,34,24,36,73.4,13.4,124.73,136.73,147.95,158.95,41.37,-285,+73,+17,-286,+17,+13",
"11,22,23,24,139,73.117,151.84,196.151,185.117,-11,+140,+185,-22,+140,+73,-23,+140,+151",
"12,72,71,70,83,139,11,10,9,149,94,126,128,127,139,138,150,-71,+25,+37,-70,+25,+84,-83,+84,+95,-139,+95,+37"];
var inwordings=["",
"Get 2 rectangles to 2 squares by moving 2 matches. Which 2?",
"Get gap at bottom left closed up and leaving 2 squares by moving 2 matches. Which 2?",
"Turn Y-like figure upside down by moving 2 matches. Which 2?",
"Get four equal sized rectangles from these three equal sized squares by moving 2 matches. Which 2?",
"Get 1 parallelogram and 1 equilateral triangle by moving 2 matches. Which 2?",
"This house can become 2 by moving 1 match. Which 1?",
"Get 6 squares out of these 3 equal sized rectangles by moving 3 matches. Which 3?",
"Turn the dog around by moving 1 match. Which 1?",
"Make this dog look back by moving 2 matches. Which 2?",
"Make this pattern into a 3d cube by moving 3 matches. Which 3?",
"Change the L shape pattern into 4 equal sized squares by moving 4 matches. Which 4?"];

var sq=["Is the additive identity.",
"Is the multiplicative identity.",
"Is the only even prime.",
"Is the number of spatial dimensions we live in.",
"Is the smallest number of colours sufficient to colour all planar maps.",
"Is the number of Platonic solids.",
"Is the smallest perfect number.",
"Is the smallest number of sides of a regular polygon that is not constructible by straightedge and compass.",
"Is the largest cube in the Fibonacci sequence.",
"Is the maximum number of cubes that are needed to sum to any positive integer.",
"Is the base of our number system.",
"Is the largest known multiplicative persistence.",
"Is the smallest abundant number.",
"Is the number of Archimedian solids.",
"Is the smallest even number n with no solutions to phi(m) = n.",
"Is the smallest composite number n with the property that there is only one group of order n.",
"Is the only number of the form xy = yx with x and y being different integers.",
"Is the number of wallpaper groups.",
"Is the only positive number that is twice the sum of its digits.",
"Is the maximum number of 4th powers needed to sum to any number.",
"Is the number of rooted trees with 6 vertices.",
"Is the smallest number of distinct squares needed to tile a square.",
"Is the number of partitions of 8.",
"Is the smallest number of integer-sided boxes that tile a box so that no two boxes share a common length.",
"Is the largest number divisible by all numbers less than its square root.",
"Is the smallest square that can be written as a sum of 2 squares."];

function maybenocont(inv) {
if (inv.length > 0) { return ' nocont'; } else { return ''; }
}

function vplus(fb) {
var xf=eval(fb.split(',')[0]);
var yf=eval(fb.split(',')[1].split(';')[0]);
return fb + eval(xf) + ',' + eval(1 + yf) + ';' + eval(1 + xf) + ',' + eval(yf) + ';' + eval(1 + xf) + ',' + eval(1 + yf) + ';' + eval(xf) + ',' + eval(-1 + yf) + ';' + eval(-1 + xf) + ',' + eval(yf) + ';' + eval(-1 + xf) + ',' + eval(-1 + yf) + ';';
}

function ourmathround(inn) {
var oinn=Math.floor(Math.floor(eval('' + inn) + 23) / 47);
//if (('' + inn).indexOf('220.') != -1 || ('' + inn).indexOf('218.') != -1) { alert('inn=' + inn + ' and oinn=' + oinn + ' results in ' + '' + eval(eval('' + oinn) * 5)); }
//if (vstr != '') { alert(vstr); }
return '' + eval(eval('' + oinn) * 47);
}

function picksq() {
sqchoice=Math.floor(Math.random() * eval(0 - 1 + sq.length)) + 1;
document.getElementById('qh4').innerHTML=sqorig + ' ... Score: ' + score + '/' + goes + ' ... ' + sq[sqchoice];
}

function gridinfo(insq) {
if (insq.indexOf(' in square ') != -1) {
document.getElementById('qh4').innerHTML+=insq;
} else {
document.getElementById('qh4').innerHTML=sqorig + insq;
}
}

function pickone(what) {
var zero=1, choice=0;
if (('' + location.hash).indexOf('blank') == -1 && ('' + location.hash).indexOf('square') == -1 && ('' + location.hash).indexOf('grid') == -1) {
choice=Math.floor(Math.random() * eval(0 - zero + inquestions.length)) + zero;
if (document.URL.indexOf('?') == -1 && ('' + location.hash) == '') {
location.href=document.URL.split('#')[0].split('?')[0] + '?wording=' + encodeURIComponent(inwordings[choice]) + '&question=' + encodeURIComponent(inquestions[choice]);
}
} else if (('' + location.hash).indexOf('blank') != -1) {
zero=0;
location.href=document.URL.split('#')[0].split('?')[0] + '?wording=' + encodeURIComponent('Vertex Pointing Game') + '&question=%20' + location.hash;
} else if (('' + location.hash).indexOf('square') != -1) {
zero=0;
location.href=document.URL.split('#')[0].split('?')[0] + '?wording=' + encodeURIComponent('Square Pointing Game') + '&question=%20' + location.hash;
} else if (('' + location.hash).indexOf('grid') != -1) {
zero=0;
location.href=document.URL.split('#')[0].split('?')[0] + '?wording=' + encodeURIComponent('Grid Pointing Game') + '&question=%20' + location.hash;
}
return what;
}

function acl() {
if (inas.length > 0 && inas.length > jinas) {
if (inas[jinas].indexOf('-') != -1) {
hrclick(document.getElementById('hr' + inas[jinas].replace('-','').replace('dr','').replace('hr','')));
jinas++;
setTimeout(acl, 2000);
} else {
hrclick(document.getElementById('hr' + inas[jinas].replace(' ','').replace('+','').replace('dr','').replace('hr','')));
jinas++;
setTimeout(acl, 2000);
}
}
}

// Thanks to https://stackoverflow.com/questions/16227300/how-to-draw-bezier-curves-with-native-javascript-code-without-ctx-beziercurveto
function placebezierpoint(t, p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
var cX = 3 * (p1x - p0x),
bX = 3 * (p2x - p1x) - cX,
aX = p3x - p0x - cX - bX;

var cY = 3 * (p1y - p0y),
bY = 3 * (p2y - p1y) - cY,
aY = p3y - p0y - cY - bY;

var x = (aX * Math.pow(t, 3)) + (bX * Math.pow(t, 2)) + (cX * t) + p0x;
var y = (aY * Math.pow(t, 3)) + (bY * Math.pow(t, 2)) + (cY * t) + p0y;
//alert('' + x + ' ' + y);
document.getElementById('hrs').innerHTML+='<hr class="vertex" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="position:absolute;top:' + y + 'px;left:' + x + 'px;"></hr>';
hrcnt++;

//return {x: x, y: y};
}

function dobezier(x0, y0, x1, y1, x2, y2, x3, y3) {
var accuracy = 0.01; //this'll give the bezier 100 segments
//var p0 = {x: x0, y: y0}; //use whatever points you want obviously
//var p1 = {x: x1, y: y1};
//var p2 = {x: x2, y: y2};
//var p3 = {x: y3, y: y4};
//var p;

//alert(67);

document.getElementById('hrs').innerHTML+='<hr class="vertex" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="position:absolute;top:' + y0 + 'px;left:' + x0 + 'px;"></hr>';
hrcnt++;
//alert(67);
while (eval('' + accuracy) < 1.00) {
//alert(61);
placebezierpoint(accuracy, x0, y0, x1, y1, x2, y2, x3, y3); //p0, p1, p2, p3);
accuracy+=0.01;
//alert(167);
}
}

function hrclick(inhro) {
try {
//alert(inhro.id);
hro=document.getElementById(inhro.id.replace('dr','hr'));
if (hro != null) {
var topdiff=0.0, leftdiff=0.0;
//alert(hro.id);
var whro='';
whro=('' + hro.style.width).replace('px','');
//document.title=whro;
if (isNaN(whro)) {
whro=('' + hro.style.height).replace('px','');
//document.title+=' ** ' + whro;
}
//if (eval(('' + hro.style.width).replace('px','')) > 9 || inhro.outerHTML.indexOf('<div') != -1 || inhro.id != inhro.id.replace('dr','hr')) {
if (eval(whro) > 9 || inhro.outerHTML.indexOf('<div') != -1 || inhro.id != inhro.id.replace('dr','hr')) {
if (('' + location.hash).indexOf('grid') != -1) { gridinfo(' ... Element Type ' + hro.outerHTML.substring(1).split(' ')[0] + ' is ' + eval(whro) + ' pixels long'); }
if (!haveclickedvertex || vertices_in_a_row == 0) {
lastdel=hro;
//alert(hro.id + ' vs ' + inhro.id);
//inhro.style.width='0px';
//inhro.style.height='0px';
hro.style.display='none'; //visibility='hidden';
hro.style.visibility='hidden'; //visibility='hidden';
vertices_in_a_row=0;
}
} else if (vertices_in_a_row == 0) {
v1=inhro;
viar_left[0]=eval(('' + hro.style.left).replace('px',''));
viar_top[0]=eval(('' + hro.style.top).replace('px',''));
vertices_in_a_row=1;
document.getElementById('pout').innerHTML="<style> #" + inhro.id + "::after { content:'\\000031\\0020e3'; } </style>";
if (('' + location.hash).indexOf('blank') != -1) {
if (bpointsx.length < 4) {
bpointsx.push(viar_left[0]);
bpointsy.push(viar_top[0]);
if (bpointsx.length >= 4) { dobezier(bpointsx[0],bpointsy[0],bpointsx[1],bpointsy[1],bpointsx[2],bpointsy[2],bpointsx[3],bpointsy[3]); }
} else {
bpointsx[0]=bpointsx[1];
bpointsy[0]=bpointsy[1];
bpointsx[1]=bpointsx[2];
bpointsy[1]=bpointsy[2];
bpointsx[2]=bpointsx[3];
bpointsy[2]=bpointsy[3];
bpointsx[3]=viar_left[0];
bpointsy[3]=viar_top[0];
if (bpointsx.length >= 4) { dobezier(bpointsx[0],bpointsy[0],bpointsx[1],bpointsy[1],bpointsx[2],bpointsy[2],bpointsx[3],bpointsy[3]); }
}
}
} else if (vertices_in_a_row == 1) {
v2=inhro;
viar_left[1]=eval(('' + hro.style.left).replace('px',''));
leftdiff=Math.abs(viar_left[1] - viar_left[0]);
viar_top[1]=eval(('' + hro.style.top).replace('px',''));
topdiff=Math.abs(viar_top[1] - viar_top[0]);
var thiswidth=Math.sqrt(eval(topdiff * topdiff) + eval(leftdiff * leftdiff));
if (!isIE) {
//alert(document.getElementById('hr' + fhr).outerHTML + ' to ' + document.getElementById('hr' + eval(1 + eval('' + fhr))).outerHTML + ' is ' + connect(document.getElementById('hr' + fhr), document.getElementById('hr' + eval(1 + eval('' + fhr)))).replace('<div ','<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical '));
document.getElementById('hrs').innerHTML+=connect(v1, v2).replace('<div ','<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical ');
hrcnt++;
if (('' + location.hash).indexOf('blank') != -1) {
if (bpointsx.length < 4) {
bpointsx.push(viar_left[1]);
bpointsy.push(viar_top[1]);
if (bpointsx.length >= 4) { dobezier(bpointsx[0],bpointsy[0],bpointsx[1],bpointsy[1],bpointsx[2],bpointsy[2],bpointsx[3],bpointsy[3]); }
} else {
bpointsx[0]=bpointsx[1];
bpointsy[0]=bpointsy[1];
bpointsx[1]=bpointsx[2];
bpointsy[1]=bpointsy[2];
bpointsx[2]=bpointsx[3];
bpointsy[2]=bpointsy[3];
bpointsx[3]=viar_left[1];
bpointsy[3]=viar_top[1];
if (bpointsx.length >= 4) { dobezier(bpointsx[0],bpointsy[0],bpointsx[1],bpointsy[1],bpointsx[2],bpointsy[2],bpointsx[3],bpointsy[3]); }
}
}
} else if (Math.abs(topdiff) < 3.0 && Math.abs(leftdiff) > 3.0) {
if (viar_left[1] > viar_left[0]) {
//alert(0);
document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;position:absolute;top:' + viar_top[0] + 'px;left:' + viar_left[0] + 'px;"></hr>';
hrcnt++;
} else {
//alert(100);
document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;position:absolute;top:' + viar_top[1] + 'px;left:' + viar_left[1] + 'px;"></hr>';
hrcnt++;
}
} else if (Math.abs(topdiff) > 3.0 && Math.abs(leftdiff) < 3.0) {
if (viar_top[1] > viar_top[0]) {
document.getElementById('hrs').innerHTML+='<hr class=vertical onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(90deg) translateY(' + Math.floor(eval(('' + thiswidth - 0) / 2)) + 'px) translateX(' + Math.floor(eval(('' + thiswidth - 0) / 2)) + 'px) ;position:absolute;top:' + viar_top[0] + 'px;left:' + viar_left[0] + 'px;"></hr>';
hrcnt++;
} else {
document.getElementById('hrs').innerHTML+='<hr class=vertical onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(90deg) translateY(' + Math.floor(eval(('' + thiswidth - 0) / 2)) + 'px) translateX(' + Math.floor(eval(('' + thiswidth - 0) / 2)) + 'px) ;position:absolute;top:' + viar_top[1] + 'px;left:' + viar_left[1] + 'px;"></hr>';
hrcnt++;
}
} else if (Math.abs(topdiff - leftdiff) < 3.0) {
if (viar_top[1] > viar_top[0] && viar_left[1] > viar_left[0]) {
//alert(45);
document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(45deg) translateY(' + Math.floor(eval(('' + topdiff - 10) / 2)) + 'px) translateX(' + Math.floor(eval(('' + leftdiff - 10) / 2)) + 'px) ;position:absolute;top:' + viar_top[0] + 'px;left:' + viar_left[0] + 'px;"></hr>';
hrcnt++;
} else if (viar_top[1] < viar_top[0] && viar_left[1] > viar_left[0]) {
//alert(-135);
document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(135deg) translateY(' + Math.floor(eval(('' + topdiff - 0) / 2)) + 'px) translateX(' + Math.floor(eval(('' + leftdiff - 0) / 2)) + 'px) ; transform-origin(' + eval(viar_left[1] - leftdiff / 2) + 'px ' + eval(viar_top[1] + topdiff / 2) + 'px);position:absolute;top:' + eval(viar_top[1] + topdiff / 2) + 'px;left:' + eval(viar_left[1] - leftdiff / 2) + 'px;"></hr>';
} else if (viar_top[1] > viar_top[0] && viar_left[1] < viar_left[0]) {
//alert(135);
document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(135deg) translateY(' + Math.floor(eval(('' + topdiff - 0) / 2)) + 'px) translateX(' + Math.floor(eval(('' + leftdiff - 0) / 2)) + 'px) ; transform-origin(' + eval(viar_left[0] - leftdiff / 2) + 'px ' + eval(viar_top[0] + topdiff / 2) + 'px);position:absolute;top:' + eval(viar_top[0] + topdiff / 2) + 'px;left:' + eval(viar_left[0] - leftdiff / 2) + 'px;"></hr>';
hrcnt++;
} else if (viar_top[1] < viar_top[0] && viar_left[1] < viar_left[0]) {
//alert(-45);


document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(45deg) translateY(' + Math.floor(eval(('' + topdiff - 10) / 2)) + 'px) translateX(' + Math.floor(eval(('' + leftdiff - 10) / 2)) + 'px) ;position:absolute;top:' + viar_top[1] + 'px;left:' + viar_left[1] + 'px;"></hr>';


// getting there below
//document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(45deg) translateX(' + Math.floor(eval(('' + leftdiff - 0) / 2)) + 'px) translateY(' + Math.floor(eval(('' + topdiff - 0) / 2)) + 'px) ; transform-origin(' + eval(viar_left[1] + leftdiff / 2) + 'px ' + eval(viar_top[1] + topdiff / 2) + 'px);position:absolute;top:' + eval(viar_top[1] + topdiff / 2) + 'px;left:' + eval(viar_left[1] + leftdiff / 2) + 'px;"></hr>';



//document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="width:' + thiswidth + 'px;transform: rotate(45deg) translateY(' + Math.floor(eval(('' + topdiff - 0) / 2)) + 'px) translateX(' + Math.floor(eval(('' + leftdiff - 0) / 2)) + 'px) ; transform-origin(' + eval(viar_left[1] + leftdiff / 2) + 'px ' + eval(viar_top[0] + topdiff / 2) + 'px);position:absolute;top:' + eval(viar_top[1] + topdiff / 2) + 'px;left:' + eval(viar_left[1] + leftdiff / 2) + 'px;"></hr>';
hrcnt++;
}
//document.getElementById('hrs').innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2) + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 1) + 'px;"></hr>';
//hrcnt++;
} else {
alert('Sorry, cannot draw this one.');
if (lastdel != null) {
lastdel.style.display='block';
}
}
//alert(leftdiff + ' ' + topdiff);
vertices_in_a_row=0;
}
//document.title='' + vertices_in_a_row;
} else {
hro=lastdel;
}
} catch(tres) {
}
}

function ina(inqs) {
// http://localhost:8888/square_hr_tracing.htm?debug=y&wording=hdgdyt%20dfh&inquestion=10,22,23,9,70,126,128,139,150,149,93,36,82,138,-82,+25,+37,-138,+95,+37
if (inanswer == '') {
if (inqs.indexOf(',-') != -1 || inqs.indexOf(',+') != -1 || inqs.indexOf(', ') != -1) {
var preurl=inqs.split(',-')[0].split(',+')[0].split(', ')[0];
var prest=inqs.replace(preurl + ',','').replace(preurl,'').replace(/\ /g,'+');
var ins=(preurl + '-').replace(',-','').replace('-','').split(',');
var inandouts=prest.split(',');
burl=pickone(document.URL);
aurl=document.URL.split('#')[0].replace('question=','q=') + '&question=' + encodeURIComponent(preurl) + '&answer=' + encodeURIComponent(prest);
//alert(prest + ' ... ' + aurl);
return preurl;
} else {
burl=pickone(document.URL);
aurl=document.URL;
}
} else {
burl=pickone(document.URL);
aurl=document.URL.replace('question=','q=').replace('answer=','question=');
}
return inqs;
}

function draw_hrs() {
var inqis='';

// if (('' + location.hash).indexOf('blank') == -1 && ('' + location.hash).indexOf('square') == -1 && ('' + location.hash).indexOf('grid') == -1) {

if (document.URL.indexOf('?') == -1 && ('' + location.hash).indexOf('blank') == -1 && ('' + location.hash).indexOf('square') == -1 && ('' + location.hash).indexOf('grid') == -1) { pickone(inqis); } else if (document.URL.indexOf('?') == -1 && (('' + location.hash).indexOf('blank') != -1 || ('' + location.hash).indexOf('square') != -1 || ('' + location.hash).indexOf('grid') != -1)) { inqis=' '; pickone(inqis); }
wording=location.search.split('wording=')[1] ? decodeURIComponent(location.search.split('wording=')[1].split('&')[0]) : ' ';
inanswer=location.search.split('answer=')[1] ? decodeURIComponent(location.search.split('answer=')[1].split('&')[0]) : inqis;
var inquestion=location.search.split('question=')[1] ? ina(decodeURIComponent(location.search.split('question=')[1].split('&')[0])) : '';
var tds=document.getElementsByTagName('td');
var fhr=0, vdval='', thisv='', into='hrs', defvdval='', toff=6, loff=-2;
dval='';
for (var itds=0; itds<tds.length; itds++) {
tds[itds].id='td' + eval(1 + itds);
if (('' + location.hash).indexOf('grid') != -1) { into='td' + eval(1 + itds); }
if (('' + location.hash).indexOf('blank') != -1 || ('' + location.hash).indexOf('square') != -1 || ('' + location.hash).indexOf('grid') != -1) {
if (('' + location.hash).indexOf('square') != -1) { if (eval(1 + itds) > 9) { document.getElementById('spout').innerHTML+="<style> #td" + eval(1 + itds) + "::after { content:'\\00003" + Math.floor(eval(eval(1 + itds) / 10)) + "\\0020e3\\00003" + eval(eval(1 + itds) % 10) + "\\0020e3'; } </style>"; } else { document.getElementById('spout').innerHTML+="<style> #td" + eval(1 + itds) + "::after { content:'\\00003" + eval(eval(1 + itds) % 10) + "\\0020e3'; } </style>"; } defvdval="visibility:hidden;"; tds[itds].style.border='1px solid red'; }
if (('' + location.hash).indexOf('grid') != -1) { tds[itds].style.border='1px solid brown'; }
tds[itds].onclick=function(event) { lastsquare=eval(('' + this.id).replace('td','')); goes++; if (lastsquare == sqchoice) { score++; } if (('' + location.hash).indexOf('square') != -1) { picksq(); } else if (('' + location.hash).indexOf('grid') != -1) { gridinfo(' in square number ' + lastsquare); } };
}
thisrect=tds[itds].getBoundingClientRect();
//squares.push(('' + thisrect.left).replace('px','') + "," + ('' + thisrect.top).replace('px','') + ";" + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px',''))) + "," + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px',''))));
//alert(('' + thisrect.left) + ' ' + ('' + thisrect.top) + ' ' + ('' + thisrect.width) + ' ' + ('' + thisrect.height) + ' ' + squares[0]);

fhr=hrcnt;

//vertices.push(('' + thisrect.left).replace('px','') + "," + ('' + thisrect.top).replace('px',''));
vdval=defvdval;
thisv=';' + ourmathround(eval(('' + thisrect.left).replace('px',''))) + "," + ourmathround(eval(('' + thisrect.top).replace('px',''))) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + thisrect.top + 'px;left:' + thisrect.left + 'px;"></hr>';
hrcnt++;


//vertices.push(('' + thisrect.left).replace('px','') + "," + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px',''))));
vdval=defvdval;
thisv=';' + ourmathround(('' + thisrect.left).replace('px','')) + "," + ourmathround(eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')))) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px',''))) + 'px;left:' + thisrect.left + 'px;"></hr>';
hrcnt++;

//vertices.push(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px',''))) + "," + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px',''))));
vdval=defvdval;
thisv=';' + ourmathround(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')))) + "," + ourmathround(eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')))) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px',''))) + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px',''))) + 'px;"></hr>';
hrcnt++;

//vertices.push(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px',''))) + "," + ('' + thisrect.top).replace('px',''));
vdval=defvdval;
thisv=';' + ourmathround(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')))) + "," + ourmathround(('' + thisrect.top).replace('px','')) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
if (hrcnt == 134 || hrcnt == 146) { alert(vdval + ' hr' + hrcnt + ': ' + thisv + ' ... ' + vstr); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + thisrect.top + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px',''))) + 'px;"></hr>';
hrcnt++;

//

//vertices.push(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2) + "," + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2));
vdval=defvdval;
thisv=';' + ourmathround(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2)) + "," + ourmathround(eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2)) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2) + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2) + 'px;"></hr>';
hrcnt++;


//vertices.push(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 1) + "," + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2));
vdval=defvdval;
thisv=';' + ourmathround(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 1)) + "," + ourmathround(eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2)) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2) + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 1) + 'px;"></hr>';
hrcnt++;



//vertices.push(('' + thisrect.left).replace('px','') + "," + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2));
vdval=defvdval;
thisv=';' + ourmathround(('' + thisrect.left).replace('px','')) + "," + ourmathround(eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2)) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 2) + 'px;left:' + thisrect.left + 'px;"></hr>';
hrcnt++;



//vertices.push(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2) + "," + ('' + thisrect.top).replace('px',''));
vdval=defvdval;
thisv=';' + ourmathround(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2)) + "," + ourmathround(('' + thisrect.top).replace('px','')) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + thisrect.top + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2) + 'px;"></hr>';
hrcnt++;


//vertices.push(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2) + "," + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 1));
vdval=defvdval;
thisv=';' + ourmathround(eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2)) + "," + ourmathround(eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 1)) + ';';
if (vstr.indexOf(thisv) != -1) { vdval="visibility:hidden;"; } else { vstr+=vplus(thisv.substring(1)); }
document.getElementById(into).innerHTML+='<hr class="vertex' + maybenocont(vdval) + '" onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + vdval + 'position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px','')) / 1) + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px','')) / 2) + 'px;"></hr>';
hrcnt++;

if (eval(itds % 5) == 0) {
dval='';
if (inquestion != '') {
if (parent.document != document) {
if (parent.document.getElementById('myh1')) {
dval=dval;
document.getElementById('myh1').innerHTML='Chinese Brain Twisters Answer';
} else {
if (('' + location.hash).indexOf('blank') != -1 || ('' + location.hash).indexOf('square') != -1 || ('' + location.hash).indexOf('grid') != -1) {
document.getElementById('myh1').innerHTML=wording;
//wording=' ';
} else {
if (document.getElementById('myh3').innerHTML.indexOf(' ... ') == -1) { document.getElementById('myh3').innerHTML+=' ... Thanks to Chinese Brain Twisters by Baifang ISBN: 0-471-59505-5'; }
document.getElementById('reveal').style.display='block';
document.getElementById('skip').style.display='block';
document.getElementById('myh1').innerHTML='Chinese Brain Twisters Question';
}
}
} else {
if (('' + location.hash).indexOf('blank') != -1 || ('' + location.hash).indexOf('square') != -1 || ('' + location.hash).indexOf('grid') != -1) {
document.getElementById('myh1').innerHTML=wording;
//wording=' ';
} else {
if (document.getElementById('myh3').innerHTML.indexOf(' ... ') == -1) { document.getElementById('myh3').innerHTML+=' ... Thanks to Chinese Brain Twisters by Baifang ISBN: 0-471-59505-5'; }
document.getElementById('reveal').style.display='block';
document.getElementById('skip').style.display='block';
document.getElementById('myh1').innerHTML='Chinese Brain Twisters Question';
}
}
document.getElementById('qh4').innerHTML=wording.replace('Vertex Pointing Game','Vertex Pointing Game ... On Each Set of 4 a Bezier Curve is Shown');
if (inquestion.indexOf('r') == -1) { inquestion='hr' + inquestion.replace(/\,/g,',hr'); }
if ((inquestion + ',').indexOf('r' + hrcnt + ',') == -1 && ('' + location.hash).indexOf('grid') == -1) { dval="display:none;visibility:hidden;"; }
}
//document.getElementById(into).innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical style="' + dval + 'position:absolute;top:' + thisrect.top + 'px;left:' + thisrect.left + 'px;"></hr>';
if (!isIE) {
//alert(document.getElementById('hr' + fhr).outerHTML + ' to ' + document.getElementById('hr' + eval(1 + eval('' + fhr))).outerHTML + ' is ' + connect(document.getElementById('hr' + fhr), document.getElementById('hr' + eval(1 + eval('' + fhr)))).replace('<div ','<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical '));
document.getElementById(into).innerHTML+=connect(document.getElementById('hr' + fhr), document.getElementById('hr' + eval(1 + eval('' + fhr)))).replace('<div ','<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical ');
} else {
document.getElementById(into).innerHTML+='<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical style="' + dval + 'position:absolute;top:' + eval(toff + eval('' + thisrect.top)) + 'px;left:' + eval(loff + eval('' + thisrect.left)) + 'px;"></div>';
}
hrcnt++;
}
if (itds < 5) {
dval='';
if (inquestion != '') {
if ((inquestion + ',').indexOf('r' + hrcnt + ',') == -1 && ('' + location.hash).indexOf('grid') == -1) { dval="display:none;visibility:hidden;"; }
}
document.getElementById(into).innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + dval + 'width:100px;position:absolute;top:' + thisrect.top + 'px;left:' + thisrect.left + 'px;"></hr>';
hrcnt++;
}
//document.getElementById(into).innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical style="' + dval + 'position:absolute;top:' + thisrect.top + 'px;left:' + eval(eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px',''))) + 'px;"></hr>';
dval='';
if (inquestion != '') {
if ((inquestion + ',').indexOf('r' + hrcnt + ',') == -1 && ('' + location.hash).indexOf('grid') == -1) { dval="display:none;visibility:hidden;"; }
}
if (!isIE) {
//alert(document.getElementById('hr' + fhr).outerHTML + ' to ' + document.getElementById('hr' + eval(1 + eval('' + fhr))).outerHTML + ' is ' + connect(document.getElementById('hr' + fhr), document.getElementById('hr' + eval(1 + eval('' + fhr)))).replace('<div ','<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical '));
document.getElementById(into).innerHTML+=connect(document.getElementById('hr' + eval(3 + eval('' + fhr))), document.getElementById('hr' + eval(2 + eval('' + fhr)))).replace('<div ','<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical ');
} else {
document.getElementById(into).innerHTML+='<div onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' class=vertical style="' + dval + 'position:absolute;top:' + eval(toff + eval('' + thisrect.top)) + 'px;left:' + eval(loff + eval(('' + thisrect.left).replace('px','')) + eval(('' + thisrect.width).replace('px',''))) + 'px;"></div>';
}
hrcnt++;
dval='';
if (inquestion != '') {
if ((inquestion + ',').indexOf('r' + hrcnt + ',') == -1 && ('' + location.hash).indexOf('grid') == -1) { dval="display:none;visibility:hidden;"; }
}
document.getElementById(into).innerHTML+='<hr onclick="hrclick(this);" ' + tprefix + 'title=hr' + hrcnt + ' id=hr' + hrcnt + ' style="' + dval + 'width:100px;position:absolute;top:' + eval(eval(('' + thisrect.top).replace('px','')) + eval(('' + thisrect.height).replace('px',''))) + 'px;left:' + thisrect.left + 'px;"></hr>';
hrcnt++;

dval='';

}
onld=false;
dval='';

if (('' + location.hash).indexOf('grid') != -1) { document.getElementById('mytable').style.marginTop='8px'; document.getElementById('mytable').style.marginLeft='3px'; }

if (inquestion.indexOf('.') != -1) {
var xinas=inquestion.split(',');
for (ix=0; ix<xinas.length; ix++) {
if (xinas[ix].indexOf('.') != -1) {
hrclick(document.getElementById('hr' + xinas[ix].split('.')[0].replace('-','').replace('dr','').replace('hr','')));
hrclick(document.getElementById('hr' + xinas[ix].split('.')[1].replace('-','').replace('dr','').replace('hr','')));
}
}
}

document.getElementById('myh3').innerHTML = document.getElementById('myh3').innerHTML.replace(" - ","<select style=width:35px; onchange=selc(this.value);><option value=" + document.URL.split('#')[0] + location.hash + "> - </option><option value=" + (document.URL.split('#')[0].split('?')[0] + 'l').replace('.htmll','.html') + ">Tracing Square Line Drawing</option> <option value=" + document.URL.split('#')[0].split('?')[0].replace('.html','.htm') + ">Chinese Brain Twisters</option><option value=" + document.URL.split('#')[0].split('?')[0].replace('.html','.htm') + "#blank>Vertex Pointing Game</option><option value=" + document.URL.split('#')[0].split('?')[0].replace('.html','.htm') + "#square>Square Pointing Game</option><option value=" + document.URL.split('#')[0].split('?')[0].replace('.html','.htm') + "#grid>Grid Pointing Game</option></select>");

inas=inanswer.split(',');
if (inas.length > 0) {
setTimeout(acl, 2000);
}

sqorig=document.getElementById('qh4').innerHTML;

if (('' + location.hash).indexOf('square') != -1) { picksq(); }

}

function selc(tvi) {
if ((document.URL.split('#')[0] + location.hash) != tvi) { location.href=tvi; }
}

function getOffset(el) { // thanks to https://stackoverflow.com/questions/8672369/how-to-draw-a-line-between-two-divs
var rect = el.getBoundingClientRect();
return {
left: rect.left + window.pageXOffset,
top: rect.top + window.pageYOffset,
width: rect.width || el.offsetWidth,
height: rect.height || el.offsetHeight
};
}

function connect(div1, div2) { //, color, thickness) { // draw a line connecting elements
var thickness = 0;
var ioff=-4;
if (!onld && 4 == 5) { ioff=0; }
var off1 = getOffset(div1);
var off2 = getOffset(div2);
// bottom right
var x1 = off1.left + off1.width;
var y1 = off1.top + off1.height;
// top right
var x2 = off2.left + off2.width;
var y2 = off2.top;
// distance
var length = Math.sqrt(((x2-x1) * (x2-x1)) + ((y2-y1) * (y2-y1)));
// center
var cx = ((x1 + x2) / 2) - (length / 2);
var cy = ((y1 + y2) / 2) - (thickness / 2);
// angle
var angle = Math.atan2((y1-y2),(x1-x2))*(180/Math.PI);
// make hr
var htmlLine = "<div style='" + dval + "padding:0px; margin:0px; height:4px; position:absolute; left:" + eval(ioff + cx) + "px; top:" + eval(ioff + cy) + "px; width:" + length + "px; -moz-transform:rotate(" + angle + "deg); -webkit-transform:rotate(" + angle + "deg); -o-transform:rotate(" + angle + "deg); -ms-transform:rotate(" + angle + "deg); transform:rotate(" + angle + "deg);' />";
//
// alert(htmlLine);
return htmlLine; //document.body.innerHTML += htmlLine;
}

</script>
</head>
<body onload=' draw_hrs(); '>
<h1 id=myh1>Tracing Square Line Drawing</h1>
<h3 id=myh3>RJM Programming - December, 2018</h3>
<h4 id=myh4>Hint: Click/touch a match then two vertices to reposition that match</h4>
<h4 id=qh4> </h4>
<table><tr><th>
<table id=mytable>
<tbody>
<tr><td class=square></td><td class=square></td><td class=square></td><td class=square></td><td class=square></td></tr>
<tr><td class=square></td><td class=square></td><td class=square></td><td class=square></td><td class=square></td></tr>
<tr><td class=square></td><td class=square></td><td class=square></td><td class=square></td><td class=square></td></tr>
<tr><td class=square></td><td class=square></td><td class=square></td><td class=square></td><td class=square></td></tr>
<tr><td class=square></td><td class=square></td><td class=square></td><td class=square></td><td class=square></td></tr>
</tbody>
</table>
</th><th id='tdhuh' style='vertical-align:top;'> <input style='display:none;background-color:yellow;' type=button id=reveal value='Reveal Answer' onclick="if (this.value.indexOf('Reveal') != -1) { this.value='Another Teaser?'; location.href='#reveal'; document.getElementById('pout').innerHTML='<style> .vertex { opacity: 0.1; } </style>'; document.getElementById('tdandthen').innerHTML='<iframe src=' + aurl + ' style=width:560px;height:600px;background-color:#f0f0f0;></iframe>'; } else { this.value='Reveal Answer'; document.getElementById('tdandthen').innerHTML=''; location.href=burl.split('#')[0].split('?')[0]; } "></input> <br><input type=button id=skip value=Skip style=background-color:lightgreen;display:none; onclick="location.href=document.URL.split('#')[0].split('?')[0]; "></input></th><th id='tdandthen'></th></tr>
</table>
<div id=hrs></div>
<div id=pout></div>
<div id=spout></div>
</body>
</html>