Remove a:hover using JavaScript (not using jQuery... don't ask)

I thought this would be pretty simple; basically, it's a 5-star rating system. When a user clicks, for example, three stars, I want to freeze those three stars right where they're at. I've been trying to simply remove the hover for the a href so it stays what it was at; maybe that's not the right method. I've exhausted absolutely everything I can think of. By the way this is straight JavaScript, not jQuery or anything. It's crazy, I know but all of the JS was written straight.

I've got this class:

.star-rating li a{
    display:block;
    width:25px;
    height: 25px;
    text-decoration: none;
    text-indent: -9000px;
    z-index: 20;
    position: absolute;
    padding: 0px;
}
.star-rating li a:hover{
    background: url(images/alt_star.png) left bottom;
    z-index: 2;
    left: 0px;
}
.star-rating a:focus,
.star-rating a:active{
    border:0;   
    -moz-outline-style: none;
            outline: none; 
}
.star-rating a.one-sta开发者_如何学JAVAr{
    left: 0px;
}
.star-rating a.one-star:hover{
    width:25px;
}

and this code:

<ul class='star-rating'>
<li><a href="#" onclick="javascript: vote(<?=$id;?>, 1); disableStars(); return false;" 
           title='1 star out of 5' id="1s" class='one-star'>1</a></li>

I'd recommend adding a class to the element that contains them all, and then removing the class when you dont want the hover to affect it anymore.

.not-selected.star-rating a.one-star:hover{
    width:25px;
}

With some javascript, remove the not-selected class, therefore disabling the rule that applies to the hover effect.

If you want to remove :hover behavior from the anchor tag add another class without a:hover style.