I am developing a site in Drupal 7. I am using webform for creating a "contact us" form. After submitting the from successfully, the page is redirected to a confirmation page where the url is http://www.somesite.com/node/11/done?sid=3. I want this particular url as http://www.somesite.com/thankyou.
I tried to set the url alias for node/11/done?sid=% as thankyou. But unfortunately it doesn't work for me.
Any suggestions about a solution for this?