Search type links in Yahoo - how to implement similar behaviour


Problem :

When you open the yahoo main page at the top there is a search section that contains links like: Web, Images, Video, More

When clicking on the link the chosen section is activated and the text of the search button is being changed. The only part of the page that is updated is the search part at the top and the other parts of the website remain unaffected.

My question is how is this implemented? And more importantly how similar behaviour could be implemented in .net using VS 2008?

Are the links really links or different elements that only mimic the links behaviour? Does it need to be ajax, or just everything is preloaded and hidden using some css techniques?

Is the same technique used in the news section on the same page when changing tabs: News, Sport, Entertainment, Video?

Thank you

Solution :

This is actually done with CSS and Javascript:

<ul id='menu'>
  <li><a href="#web_search" class='active'>Web</a></li>
  <li><a href="#image_search">Image</a></li>
  <li><a href="#video_search">Video</a></li>
  <li><a href="#local_search">Local</a></li>

<div id='web_search' class='search'></div>
<div id='image_search' class='search' style='display: none;'></div>
<div id='video_search' class='search' style='display: none;'></div>
<div id='local_search' class='search' style='display: none;'></div>

Then Javascript (example uses jQuery, can be done many ways...):

$('a','#menu').click(function() {
    $('', '#menu').removeClass('active');
    return false;

And this is an example of it in action. The styling and such would all be CSS.

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