How add floating ads in left and right vb4

[Emad ELsayed]

welcome everybody
How add floating ads in left and right vb4 ?
This code works

PHP Code:

<div id="RightFloatAds" style="right: 0px; position: fixed; text-align: center; top: 0px;"> Google AdSense Code </div> 


PHP Code:

<div id="LeftFloatAds" style="Left: 0px; position: fixed; text-align: center; top: 0px;"> Google AdSense Code </div> 


But when minimize the window size of the Forum .. comes in the background
Is there a way to fit with Style