Anchoring a dialog to a link

I'm using 1.5 ui.base.js and ui.dialog.js for a simple dialog:
$("#fscbox").dialog("open");
The dialog itself looks pretty good, but it pops up in the center of
the screen. I'd like it to pop up right below the link that triggers
it. I'm very new to jQuery in general, so I'm not sure how to go
about this. How can I anchor my dialog to my link?