From http://stackoverflow.com/questions/200337/whats-the-best-way-to-automatically-redirect-someone-to-another-webpage

new_gist_file.js

// use this to avoid redirects when a user clicks "back" in their browser
window.location.replace('http://somewhereelse.com');

// use this to redirect, a back button call will trigger the redirection again
window.location.href = "http://somewhereelse.com";

// given for completeness, essentially an alias to window.location.href
window.location = "http://somewhereelse.com";