function getHTTPObject() {
 
 var xmlhttp;
 
  if(window.XMLHttpRequest){
    xmlhttp = new XMLHttpRequest();
  }
  else if (window.ActiveXObject){
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    if (!xmlhttp){
        xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
}
  return xmlhttp;
}
var ajaxObj = getHTTPObject(); 

function paginate(pages,thispage,catid,clickedlink)
{	
	url ='display_productlist.php?thispage='+thispage+"&pages="+pages+"&catid="+catid+"&type=all&"+clickedlink+'=true'+'&sid='+Math.random(); //alert(url);
	ajaxObj.open("GET", url, true);
	ajaxObj.onreadystatechange = displaytext ;
	ajaxObj.send(null);
}

function displaytext() 
{ 
	if (ajaxObj.readyState == 4) {
	  if(ajaxObj.status==200) {
		var results=ajaxObj.responseText;
		document.getElementById("list").innerHTML = results;
	  } 
	}
}