Ajax works fine Chrome but gives errors in IE*

[SkyuVa]

IE8 is giving me an Unknown Runtime Error, on the following line.

     document.getElementById("txtHint").innerHTML=xmlhttp.responseText;

Here is the complete function.

 function showUser(str)
{
//str=document.getElementById("users").value;
//alert(str);

if (str=="")
  {
  document.getElementById("txtHint").innerHTML="";
  return;
  } 
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","ajax_ldap.php?q="+str,true);
xmlhttp.send();
}

[SkyuVa]

Solved

It turns out that the ajax page I was calling has a form in it. Which means that I was inserting a form into a form . Refer to the bottom following link for an in depth explanation.

http://www.tek-tips.com/viewthread.cfm?qid=1425914&page=7