var xmlHttp
function getCat(input){
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
} 
var url="./includes/getcat.php?cat="+input.id
//var url="test.php"
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
function stateChanged() 
{ 
if (xmlHttp.readyState < 4){
 document.getElementById("categories").innerHTML="<div class=\"loading\"><img src=\"./layout/img/ajax-loader.gif\"></div>"
} else { 
var ny = xmlHttp.responseText
var ni = document.getElementById('categories');
ni.innerHTML = ny;
} 
}
}
function GetXmlHttpObject()
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}