Hi friends,
I m devoloping website for online examination in ASP.net and i want to disabale "Back" option of the window so send me code if you have

Technically I don't believe you are allowed to disable the back button in the browser.

Given that you are creating an examination system one solution is to set a session variable counting the questions answered and on page load if they are trying to load a page with a lower number than the previous quiestion (by pressing back) then send them back to the correct page, or an error trapping page, if you want to warn them.

Sorry, I forgot to mention that to force the page load you may also need to set the cache expiry

Response.Cache.SetCacheability(HttpCacheability.No Cache)

So that the user then has to press refresh.

You can do this with javascript.. there are plenty of exampls online

Use HtmlHIdden control.When you click submit button,in clientside, say Hidden1.value = 1.if Hidden1.value !=1; document.reload.That's all.