jquery css issue in IE7,IE6

[Bharani kumar srinivasan]

Hit me, test me<http://qa.ukatn.com/103/website/ta/feedback/feedback-form.php?fid=1&rno=TA20020>

*var numStars = 15;
function change_star_image(question_id,star_id){
var count_star_rating = 0;
for (var i=1;i<numStars+1;i++){
if(i<=star_id){count_star_rating += 1;
$("#"+question_id+"_star_rating_image_"+i).css('background',
'url(images/full-star.gif) no-repeat 0 0');
$("#"+question_id+"_star_rating_image_"+i).css('width', '20px');
$("#"+question_id+"_star_rating_image_"+i).css('height', '19px');
}else{
$("#"+question_id+"_star_rating_image_"+i).css('background',
'url(images/empty-star.gif)no-repeat 0 0');
$("#"+question_id+"_star_rating_image_"+i).css('width', '20px');
$("#"+question_id+"_star_rating_image_"+i).css('height', '19px');
}

}*

document.getElementById(question_id+"_user_star_rating").value =
count_star_rating; }

Functionality is ,

Question and answer , answer type is rating ,

For answer user just select the star,

The prob is in IE7 and IE5, when user over to star , the star's going to
hide mode,

Please tell , when i have to do now

Working Fine in FF,IE8,

But stars not working in IE6,IE7 ,

Any idea