I have this static div on a page:

<div class="stars stars-40"></div>

I have a variable called {rating} in my template.  The variable is always in .5 increments, .5 to 5.0 and I have the appropriate classes in my style sheet.

If the rating is 3.5, I want to change the class in the div to:

<div class="stars stars-35"></div>

What is a good way to do this?

I was thinking in jQuery I could do this: 

var  s  =   '{rating}' . replace ( /\./ g ,   '' );

to strip out the decimal.  But I'm not sure on how to make the div update with the "35" value?  I'm not sure on the jQuery selector I should use either. 

Thanks.

-JBD