unblock a block this ad

I tried to block a flag, ad or make i google your home page thing and somehow I blocked the browser page I can't get it back. Please someone help!!!

What?

Sorry, Im new to computing (old guy)

I tried to remove a small strip that came up on my screen that said (make igoogle my home page) I right clicked and was looking for delete, but I saw block this ad. I clicked it and the whole browser page disappeared leaving a blue screen with the browser bars or whatever you call them at the top. When I reload I can see the Igoogle page for a second then its gone. Thanks for replying, I hope you can help. If you need to call me my number is 972-312-1514 Landi