Update: added back() to keep the browser from moving to a page displaying the javascript.
Second update: removed back() because it doesn't do what it seemed to, and when you finally get to the right page, the onclick function seems to be back too.
Here is a javascript bookmarklet you need to disable the annoying popups on tripod.com. Copy it to your toolbar or a bookmark folder and use it to delete the onclick function which tripod puts on its pages. Then press back.
Well, wordpress won't let me put a javascript: link on my web page (wonder why… surely they don't think I would do anything nasty in it…). Anyway, you need to make a bookmark and put this text in the location field:
javascript:document.body.onclick=function(){};