Hi JAYHAWKER,

I would like to suggest you try $('#<%= Master.pnl %>').slideDown("slow");

at first, plesae check if $('#<%= Master.pnl %>') can get the correct div object, and then apply slideDown effect.

JAYHAWKER

The following will show it but it doesn't slide down.   var pnlRef = document.getElementById('<%= Master.pnl %>');                   pnlRef.style.display = "inline";

in above code pnlRef can show div, but can not slide down, please try to remove pnlRef.style.display = "inline"; and add code to explicitly set the "top" and "left" of div, you can refer article below

http://forum.jquery.com/topic/jquery-effects-like-slidedown-that-leave-display-set-to-inline

Hope this helps, thanks.