mono_jit23 1 Junior Poster in Training

I have a aspx page where am showing a pdf document using iframe. and beside it am dynamically creating linnks of last 5 uploaded pdf files. Now I want to change the pdf showing through iframe to change on respective hyperlink click.
I have shown the pdf and the links but not been able to reload the iframe on hyperlink click...
please give some of your relative suggestions to make it through....