Disable All Form Elements > script

Disable All Form Elements
Another question I have seen a lot lately is how can I disable all of the form
elements on the page with JavaScript? Well it is rather simple and only takes
a few lines of code. All you need to do is loop through the Form elemnt array
and set the disabled property to true to disable the elements and false
to enable the elements.

http://radio.javaranch.com/pascarello/2005/05/17/1116340367337.html