如何在没有回发的情况下更改同一页面上的查询字符串

I want to change the querystring on the page where I write notes. When I save the note I want the querystring to have the entry for that note. So after the initial save the user can update based on the querystring. But to update the querystring I need to do full postback. Is there anyway to change the querystring like this?I want to change the querystring on the page wh