How to create collapsing Menus?

[carl allan]

Hi, i have a standard menu bar. I want it to collapse whenever i click at the primary button. I have tried using some scripts that can be downloaded via the web but the table design, in turn, was ruined. My boss said that i should use DOM on it. (eq. hide and unhide the table) Is this possible? Help me please.

[actionsketch]

<tag onclick="document.getElementById('table').style.visibility='hidden'">

[MadPotato]

...and with some more CSS you can make a drop down. To make it dont take space int the page, and get the position you want, use something like:position: absolute;left: 20;top: 20;