Update URL from Javascript

I need code to achieve the following: If a user visits [login to view URL], then the url should be set to [login to view URL] If "w" is pressed, then the url should be set to [login to view URL] The code modification that you make has to not interfere with the performance or functionality of the web page, so reloading the page to modify the url is not a solution. Please have a look here for how to achieve this: [login to view URL] Your solution only needs to work on the latest Chrome and Firefox. I always get confused with bids for hours, so please state the dollar payment you expect for completing this. If you provide your [login to view URL] username with your bid, then I can give you access to our code repository.