var xmlHttp

function cart(acton)
{
	var mod; 	
	var qty;	
	var strAction = acton;
	 
	var	ctrlQty = eval("document.frmCart.qty");
	var	ctrlChk = eval("document.frmCart.chk");
	 
	qty = ctrlQty.value;
	 
 	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 
	if(strAction == 'addItem'){		 
		if(ctrlChk.checked == true){
			mod = 'add';
			qty = ctrlQty.value ;
		}else{
			mod = 'del';
			ctrlQty.value = '1';			 
		}
	}else{
		mod = 'add';
		 
	}	
	var url="ajax/cart.php";
	url=url+"?mod="+mod;	 
	url=url+"&qty="+qty;
	url=url+"&sid="+Math.random();
	url=url+"&tmstmp="+new Date().getTime();	 
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
} 

function stateChanged() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		document.getElementById("div_cart").innerHTML = xmlHttp.responseText 
	} 
}