Question

If I do something like

var url = "dynamicprice.php";
httpObject.open("GET", url, true);

everything works, but if I try to pass variables

var url = "dynamicprice.php?package=" + document.getElementById('package').value + "&markup=" + document.getElementById('markup').checked;
httpObject.open("GET", url, true);

I get no answer from dynamicprice.

What do I have to change?

Answer 1

If the elements that you’re referring to (markup and package) don’t exist, then url is never created, and your request will never be sent. Try sticking alert(url); before httpObject.open(...); and make sure that you’ve got the right URL.