Javascript redirect on page load using prototypejs

First option using href

Event.observe(window, ‘load’, function() {
window.location.href = “http://stackoverflow.com”;
});

However a better way is to use replace method.

Event.observe(window, ‘load’, function() {
window.location.replace(“http://www.google.co.uk”);
});

“because replace() does not put the originating page in the session history, meaning the user won’t get stuck in a never-ending back-button fiasco. If you want to simulate someone clicking on a link, use location.href. If you want to simulate an HTTP redirect, use location.replace.” http://stackoverflow.com/a/506004