layer id

I have two scripts that write to div id=""

1st One is: <div id="tipDiv" style="position:absolute; visibility:hidden; z-index:100"></div>

2nd One is:<DIV ID="overDiv" STYLE="position:absolute; visibility:hide; z-index:100;"></DIV>

How can I combiine the two layer id's to function in the same <DIV id=""> into one?
both scripts write to layers and display at different positions on the page.

Tried <DIV ID="tipDiv","overDiv" style="position:absolute; visibility:hidden; z-index:100"></div>
Whats the secret?

A bit confused as to what your trying to achieve.


Are you wanting both layers to have the same effect but in a different position on the page?

Are you wanting different effects and in different positions on page?


More details please!