var RATING = 0;

function changeRating(num) {
    RATING = num;
    swapStar(num);
    $('rating_field').value = num
}

function swapStar(num) {
    $R(1, num).each(function(n) { fillStar(n) });
    if (num < 5) {
        $R(num+1, 5).each(function(n) { emptyStar(n) });
    }
}

function hoverRating(num) {
    swapStar(num);
}

function fillStar(num) {
    $('full_star_'+num).show();
    $('empty_star_'+num).hide();
}

function emptyStar(num) {
    $('full_star_'+num).hide();
    $('empty_star_'+num).show();
}