var XMLHttpRequestObject = false;

if(window.XMLHttpRequest){
XMLHttpRequestObject = new XMLHttpRequest();
}else if(window.ActiveXObject){
XMLHttpRequestObject=new ActiveXObject("Microsoft.XMLHTTP");
}


function getCon(catId,conId,divID)
{

var obj = document.getElementById(divID);


var dataSource="get_content.php?cat_id="+catId;

if(conId)
{
dataSource+="&con_id="+conId;
}
XMLHttpRequestObject.open("GET", dataSource);

XMLHttpRequestObject.onreadystatechange=function()
{
if(XMLHttpRequestObject.readyState == 4 && XMLHttpRequestObject.status==200){
obj.innerHTML=XMLHttpRequestObject.responseText;
}

}
XMLHttpRequestObject.send(null);
}