Making a Post request using Ajax

[Rahul Babbar]

Hi,

I was trying to make a Post request using Ajax.
So, i wrote the below code(which i came across on the some useful website)

The crux of the code looked like

 
function postAjax(url, params, callMethod){
                createRequest();
                request.open("POST", url, true);
                //Send the proper header information along with the request
                request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                request.setRequestHeader("Content-length", params.length);
                request.setRequestHeader("Connection", "close");
                request.onreadystatechange = callMethod;
                request.send(params);

          }

Now, i thought that passing the params was only optional, until i came to know that none of my request attributes were getting to me in the controller, only the parameters passed in the 'params' are obtained.
So, i thought of calling a javascript method on click on the required button that will populate the 'params' with all the name and value in the form in the form of "name1=value1&name2=value2";
but something doesnt seem correct.
Is this the expected behaviour?
Do we really need to fill in all the form data in the parameters to get them in the controller?
Why can the implementation be done in such a way that we directly obtain the parameters in the form, just like a normal submit(probably i am getting ahead of myself.. )

Thanks a lot.

[Eric Pascarello]

Because that is how it works. If you use a library such as JQuery, it can do it for you.

Eric

[Rahul Babbar]

Thanks Eric..