Hide Field, then show when a certain selection is made

[jeffcravener]

I have a dropdown list of applications that a user can select from.

When they select one of them, I want there to be an extra field to be shown to enter a toll free number.

So, basically I want the page to have a hidden field on it, and it is only visible if a certain selection is made in the drop down list.

I figure this requires JavaScript, but I can't seem to find anything on how to do it.

Thanks in advance!!

 

[Vragabond]

You're right, it is javascript, so it would be best answered in javascript forum (forum216).