function isNumberKey(evt){
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57)){
		return false;
	}
	else{
		return true;
	}
}
function passSession(){
	document.sessionPass.submit();
}

/* START AJAX CODE */
function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();

function updateCart(){
	http.open('get', 'rpc.php');
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function handleResponse() {
    if(http.readyState == 4){
        var response = http.responseText;
        var update = new Array();

        if(response.indexOf('|' != -1)) {
            update = response.split('|');
	     if(document.getElementById(update[0]) != null && document.getElementById(update[0]) != ""   ){
		  document.getElementById(update[0]).innerHTML = update[1];
	     }
        }
    }
}