I have a webpage that works with ajax, html and php. No XML

The ajax part works good instead of one thing. The whole page(with the header image and all the html code) is loading again plus the results from my php script into the <div id="jobs"></div>.

a = document.getElementById('jobs');
a.innerHTML = '<div id="jobs"></div>';
a.innerHTML = httpRequest.responseText;

I guess that the problem is in the url.

For example:
http://www.mywebsite.com/index.php?id=test

I have a form on that page. When I submit the form (with ajax) the url that I post is something like:
http://www.mywebsite.com/index.php?i...=1&something=2

this url doesn't appear in the location bar.

So the page loads the result I want AND the whole html code from http://www.mywebsite.com/index.php?id=test again!!!
So I see the webpage 2 times.

Sorry for my english. :(

Please help me!!
geoko

The solution to that problem is:
I created a new page that contain my code and I included that page to the "http://www.mywebsite.com/index.php?id=test".

So all the process is being in the new page and appear in the "http://www.mywebsite.com/index.php?id=test".

geoko :D