How to add a parameter to the URL?

Question

My current URL is: http://something.com/mobiles.php?brand=samsung

Now when a user clicks on a minimum price filter (say 300), I want my URL to become

Answer 1

If you're having the user fill out a textfield with a minimum price, why not let the form submit as a GET-request with a blank action? IIRC, that should do just what you want, without any javascript.