Send data but not in a form
I am new to web development, and I am writing a little test site to learn some stuff. But I'm not sure how to send data to the server that is not in a form. I have two specific questions at the end of this post, but I'll try to give the relevant details first:
I enter a url in my browser that maps to a JSP on the server (JBoss/Tomcat on the server side). That JSP reads products from a database and presents a little 'shop' on the browser.
When the user adds an item to their cart, I make an Ajax call to the server, which adds to the cart and returns xml representing the cart contents.
var req = new XMLHttpRequest();
req.open("GET", "checkout", false);
if (req.status == 200)
var doc = req.responseText;
The checkout servlet writes html which contains a form for the user to enter their delivery details. As you will see, I wait for the servlet to send its response and then I overwrite the current document with it.
Question1 - What I'm doing seems wrong to me. I'm sure I should just be going to another page, a "checkout" page, rather than overwriting the current document. But as my checkout button is not in a form I don't know how to do that.
Question2 - my second question is that when I submit the form with the delivery details on it, I do not have the parameters I expect when the request hits my servlet. Instead of "CustomerName", "AddressLine1" etc, the only parameters I have are "x" and "y", both of which contain a number (a different number each time).