5,11c5,7
<  td { border: 2px solid red; width: 33%; height:33%; }
<  th { border: 2px solid red; width: 33%; height:33%; }
<  div.indiv { font-size: 12px; background-color: yellow; opacity: 0.9; }
<  
<  span {
<   transform: rotate(45deg);
<  }
---
>  td { border: 2px solid red; }
>  th { border: 2px solid red; }
>  div.indiv { font-size: 12px; background-color: yellow; }
13c9
<  .glowone {
---
> .glowone {
17c13
<  }
---
> }
19c15
<  .glow {
---
> .glow {
23c19
<  }
---
> }
25c21
<  /* Thanks to https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_glowing_text */
---
> /* Thanks to https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_glowing_text */
27c23
<  @-webkit-keyframes glow {
---
> @-webkit-keyframes glow {
35c31
<  }
---
> }
41d36
<   var spans=[];
47d41
<   var shadowtable=null;
53d46
<         spans[eval(-1 + eval(('' + glower.outerHTML.split(' id="div')[1].split('"')[0])))].innerHTML=glower.className.replace('indiv','');
96d88
<       spans[eval(-1 + eval(('' + tdo.name).replace('td','')))].innerHTML=divo.className.replace('indiv','');
113,114d104
<     var shadowrect=null;
<     
116,120d105
< 
<     document.getElementById('mytable').style.height='' + eval(-40 + screen.height) + 'px';
<     shadowrect=document.getElementById('mytable').getBoundingClientRect();
<     shadowtable=document.getElementById('mytable').outerHTML.replace('mytable', 'shadowtable').replace(' style="', ' style="position:absolute;top:' + shadowrect.top + 'px;left:' + shadowrect.left + 'px;opacity:0.5;z-index:-9;').replace(/\<td\>/g, '<td style="opacity:0.5;border: 1px solid transparent; vertical-align: middle; text-align: center;transform: rotate(45deg);font-size:50px;"><span></span>');
< 
137c122
<     //document.getElementById('mytable').style.height='' + eval(-40 + screen.height) + 'px';
---
>     document.getElementById('mytable').style.height='' + eval(-40 + screen.height) + 'px';
152,153d136
<     document.getElementById('dshadow').innerHTML=shadowtable;
<     spans=document.getElementsByTagName('span');
165d147
< <div id=dshadow></div>