通过ajax在partialpostback上渲染javascript

I have a grid on a page along with a tooltip for each cell created dynamically on dlDrivers_ItemDataBound event through javacsript. I have been using ajax on my page. When i visit the page for the first time, all the tooltips are working fine but when i perform some actions on the page and grid ispostback through ajax, but the javascript here is not rendered and the tooltip does not appear.I have a grid on a page along with a tooltip fo