javascript - Easiest way to mask a URL in the address bar? -

i have page, "http://www.somedomain.com/page.php/". what's easiest way show "http://www.somedomain.com/blahblahblah", or "http://www.somedomain.com/page.php?blahblahblah". , when enter new url in address bar, doesn't bring up?

thanks!