I am using z-index to put a flash advertisement with a transparent background at the utmost top layer of my webpage.

Since I want it to move around the screen, I stretched the file to max screen size. But by doing so I cannot click on the text / links on the webpage. If I don't cover the screen, the flash can't move around it.

How can I let it move around and yet able to click on what's on the page?!
Please help !!!

Look at this website. They did it somehow. Hmm....