function display_data(act) 
{ 


	if (act.length==0) 
	{ 
  	document.getElementById("employ_data").innerHTML=""
  	return
  } 
  

    xmlhttp=GetXmlHttpObject(); 
    if (xmlhttp==null) { 
        alert ("Your browser does not support AJAX!"); 
        return; 
    }  
    var url="catglistcall.php"; 
	url=url+"?act="+act
    xmlhttp.onreadystatechange=function() { 
        if(xmlhttp.readyState==4) { 
		if (xmlhttp.status==200){
           document.getElementById('employ_data').innerHTML=xmlhttp.responseText; 

		}
			
        } 
    } 
    xmlhttp.open("GET",url,true); 
    xmlhttp.send(null); 
	
} 

function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera <strong class="highlight">8</strong>.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet <strong class="highlight">Explorer</strong>
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}