Rating control in asp.net

Hi
Please can anyone help me to provide link or code to implement rating control in asp.net.
requirement:
while putting rating, on mouse over, stars should be highlighted and can recognized value of clicked star.
while displaying star should be highlighted as per average rating, I mean to say that last star might be highlighted 1/2 or 3/4 or ... as per average rating.
like:average rating is 3.5 means 3 stars full and 4th star half will be highlighted.

Thank
...