Change Part of a loaded HTML Page

To Change just one part of an HTML page without having to reload the whole page...

In the HTML part:
the section you want to be able to change
<div id="somename">start text optional</div>

In the Javascript:
somename.innerHTML="new text";

When the javascript is excuted the "new text" will replace the "start text optional". If you left out the start text, then the "new text" will push it's way onto the page where you told it to.

Yes it's that simple!

Hope you find this useful.