i want to change my site url..
i want to create new url with www.mysite.com/username this will be displayed in address bar.. even if you are click any link or button of my site then it will be displayed same url throughout site..
ex.. 

<http://www.willmaster.com/library/web-development/URL-masking.php>
then it must be displayed
<http://www.willmaster.com/username> in url and work as above url...