What is the problem with this?

[dblack]

I cjust create small version of what i'm trying to do. basicly 1st table has a hidden value which is '1' and second table has 2 diffrent values. onclick function second table send the value to 1st table but i need to check if the passed value is same as hidden value. Can some one tell me where is the error. i am sure that error is in "function cell(a)".

<script>
window.onload=function getid() {
   var myId;
   obj=document.getElementsByTagName('th');
for(c=0;c<obj.length;c++) {
if(obj[c].id!='') {
   obj[c].onclick=function getid() {
   myId=this.id;
e = document.getElementById(myId);
 var thestyle= eval ('document.all.'+myId+'.style');
 thestyle.backgroundColor='yellow';
    }
   }
  }
 }
function cell(a) {
getid();
e.innerHTML = a.innerHTML ;
var z = document.getElementByTagName("b");
    z = documnet.getElementById("b1");
if (z.innerHTML == a.innerHTML) 
{
  alert("ok");
}
 }
function show(div){ 
div = document.getElementById("div1");
div.style.visibility="visible";
}
 </script>
<table border="1"><th onmouseup="show('div1')" id="a1"><b id='b1' style='visibility:hidden'>1</b>?</th></table><br>

<div id="div1" style="visibility:hidden">
<table border=1><th onclick="cell(this, getid())">1</th><th onclick="cell(this, getid())">2</th></table></div> 

[Mirek Komárek]

I hope understand what it should do

<script>
window.onload=function getid() {
obj=document.getElementsByTagName('th');
for(c=0;c<obj.length;c++){
if(obj[c].id!=''){
obj[c].onclick=function(){
document.getElementById(this.id).style.backgroundColor='yellow';
}}}}
function cell(a,id){
if (document.getElementById(id).innerHTML == a.innerHTML)
{alert("ok");}}
function show(div){
document.getElementById(div).style.visibility="visible";
}
</script>
<table border="1"><th onmouseup="show('div1')" id="a1"><b id='b1' style='visibility:hidden'>1</b>?</th></table><br>
<div id="div1" style="visibility:hidden">
<table border=1>
<th onclick="cell(this,'b1')">1</th>
<th onclick="cell(this,'b1')">2</th>
</table>
</div>

[felgall]

var thestyle= eval ('document.all.'+myId+'.style');


should be

var thestyle = document.getElementById(mystyle).style;

[dblack]

this solved my problem. Thank you.