Problem In Ie6 With Overlib Function problem in IE6 with overlib function

problem in IE6 with overlib

i am using the following codes in my html and page is generating dynamically

<div id="overDiv" style="position:absolute; visibility:hide; z-index:1000;"></div>

and

<a href="mailto:snsanju@gmail.com" onMouseOver="window.status='User Details'; overlib('email: snsanju@gmail.com',RIGHT, ABOVE, HAUTO, VAUTO); return true;" onMouseOut="window.status=''; nd(); return true;"></a>

it shows the popup fine at correct position if less records(only one page), now consider if there are more records say greater than 100, and i scroll down then instead showing the popup at correct position it is displaying at top which is not visible by us. other than this IE6 its ok. whats wrong with this.