This is a demo illustrating how to strip the default values from a HTML form using javascript. The example here is a simplified version of the Google advanced search interface. Read about how this works and why you might want to do it at:
Gregable.com - Remove Default Values from HTML form submissions.

Find web pages that have...

 OR   OR 

But don't show pages that have...

Need more tools?

  (e.g. youtube.com, .edu)
Illustrate checkboxes:
and radio boxes: