/////////////

function createRequestObject2() { 
    var ro; 
    var browser = navigator.appName; 
    if(browser == "Microsoft Internet Explorer"){ 
        ro = new ActiveXObject("Microsoft.XMLHTTP"); 
    }else{ 
        ro = new XMLHttpRequest(); 
    } 
    return ro; 
} 

var http3 = createRequestObject2(); 

function isInteger(s) {
  return (s.toString().search(/^-?[0-9]+$/) == 0);
}

function addcart(id)
{
	
	var qty=document.getElementById('qty_'+id).value;
	
	if(!isInteger(qty))
	{
		alert('Please enter an Integer value');
		document.getElementById('qty_'+id).value='0';
		//return;
		qty='0';
	}
	
	url1='add_to_cart.php?qty='+qty+'&product_id='+id;
	http3.open('post', url1); 
	http3.onreadystatechange = handle_cart2; 
 	http3.send(null); 
}
function handle_cart2()
{ 
    if(http3.readyState == 4)
	{ 
        var response = http3.responseText;
		
		//alert(response);
		
		var val=response.split('|');
		
		document.getElementById("num_items").innerHTML=val[0];
		
		document.getElementById("total_amount").innerHTML=val[1];
	
	}	
	
}