function GetXmlHttpObject()
{
	var objXMLHttp=null;
	if (window.XMLHttpRequest)
	{
		objXMLHttp=new XMLHttpRequest();
	}
	else
 	 if (window.ActiveXObject)
	 {
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	 }
	return objXMLHttp;
}
var	xmlHttp;

function compare_products(category_id,product_id)
{
	xmlHttp = GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request");
		return;
	}

	var url="/js/compare_products.php";
	url=url+"?product_id="+product_id;
	url=url+"&category_id="+category_id;	
	url=url+"&sid="+Math.random();

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

function compare_products2(category_id,product_id)
{
	xmlHttp = GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request");
		return;
	}

	var url="/js/compare_products2.php";
	url=url+"?product_id="+product_id;
	url=url+"&category_id="+category_id;	
	url=url+"&sid="+Math.random();

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

function destroy_compare()
{
	xmlHttp = GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request");
		return;
	}

	var url="/js/destroy_compare.php";
	url=url+"?sid="+Math.random();

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