JS:link to a file

Any ideas on how to create a link to a file using a js script to work with jquery and thickbox.

example to open up a thickbox:
<a href=“testpage01.html?keepThis=true&TB_iframe=true&height=650&width=580” title=“I’m a title!” class=“thickbox”>Click Here</a>

I’d like to add something like… link=“file/blah.pdf” in the thickbox link so when it opens up there will be a link (to download the file) in the header included with the title.

Any suggestions would be greatly appreciated.