Pop up Add then black page

[MCFISH]

After doing a search for something like John Deere or Walker. A Deere or a Walker pop up add comes up. No big deal everyone has to pay there bills plus someone searching Deere, Walker or what ever key word that might trigger an add, might find that add interesting. What I am having trouble with after closing the add read one thread. Hit the back arrow read to another thread on the last search. the pop up comes back for instant then the screen goes black. Anybody know what might be going wrong? *trucewhiteflag*

[Michael J. Donovan]

if you click the back arrow, it looks like the screen simply darkens, but the ad is still there, it is just at the top of the page

if you scroll up you will see it