var ajaxReQ = getXmlHttpRequestObject();
function getXmlHttpRequestObject() {
    if (window.XMLHttpRequest) {
    	return new XMLHttpRequest();
    } else if(window.ActiveXObject) {
    	return new ActiveXObject("Microsoft.XMLHTTP");
    } 
}

function add_to_bag() {
	if (ajaxReQ.readyState == 4 || ajaxReQ.readyState == 0) {
		if(document.getElementById("po_name_0")) {
			var po0 = '&po_name_0='+document.getElementById("po_name_0").value+'&po_entry_0='+document.getElementById("po_entry_0").value;
		} else {
			var po0 = '&po_name_1='+document.getElementById("po_name_1").value+'&po_entry_1='+document.getElementById("po_entry_1").value;
		}
		if(document.getElementById("po_name_1")) {
			var po1='&po_name_1='+document.getElementById("po_name_1").value+'&po_entry_1='+document.getElementById("po_entry_1").value;
		} else {
			var po1='';
		}
		day = new Date();
		id = day.getTime();
		ajaxReQ.open("GET", 'includes/addtobag.php?prodnum='+document.getElementById("prodnum").value+po0+po1+'&amount='+document.getElementById("amount").value+'&time='+id, true);
		ajaxReQ.onreadystatechange = ajaxdone; 
		ajaxReQ.send(null);
	}			
}

function ajaxdone() {
	if (ajaxReQ.readyState == 4) {
		if (ajaxReQ.responseText) {
			var stuff = ajaxReQ.responseText.split('|');
			document.getElementById("bag_num_items").innerHTML = stuff[0];
			document.getElementById("bag_total").innerHTML = stuff[1];
		}
	}
}