Some websites disable my back button, how can I still use it?

Some websites disable the back button, and don't let you escape back from it. Is there a way to selectively disable this disablement of back button? I feel it offensive, and get frustrated when I encounter such websites. I use Firefox 4.


My guess: the pages have a "Meta refresh" tag or a JavaScript scriptlet, which gets activated as soon as you go "back" to them. You cannot disable these "features", as they have many legitimate uses, but you can skip the offending page by right-clicking on the "Back" button and jumping two pages back.