var xmlHttp

function showCategory(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }

//var loading_img="cpljobs/images/busy_blu.gif";
  
//document.getElementById("occdrop").innerHTML =  "Loading...";       //<img src="’ + loading_img + ‘" />"; 
var result = "";

 for (var i = 0; i < document.getElementById("catDrop").length; i++) {
        if (document.getElementById("catDrop").options[i].selected) {
            result += document.getElementById("catDrop").options[i].value + ",";
        }
    }  

if (result=="")
  {
  return;
  }	
	
var url="getcategory.asp";
url=url+"?category="+result;
//alert(url);
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("occdrop").value=xmlHttp.responseText;
document.getElementById("testdiv").innerHTML=xmlHttp.responseText;
}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}