Create your file. Do an ftp, I use filezilla. Remember your link to the file. Common extensions will be html, pdf or others.
use this script and put your graphic and url target
It would not allow me to put up this html so I took away the at the end
href="The link you want them to go to"
It won't let me put the html code here for you.
Change the border to your pixels size of graphic.
Hope this helps, I use this stuff all the time for creating button, links to my eBooks, mailing lists, almost everything I want people to click on for more information or to join.
Join me at http://scottwkelley.com
Please go to my landing page, contact me and I will send you the code via email.