var $stars	= false;

function setStars($x) {
	if ($stars) {
		if ($x<0) {
			$stars.style.backgroundImage	= $stars.backgroundImageBackup;
			$stars.style.backgroundPosition	= $stars.backgroundPositionBackup;
		} else {
			$stars.backgroundImageBackup	= $stars.style.backgroundImage;
			$stars.backgroundPositionBackup = $stars.style.backgroundPosition;
			$stars.style.backgroundImage	= "url(../images/bg_stars_act.png)";
			$stars.style.backgroundPosition	= "0 " + ($x+1)*13 + "px" + "";
		}
	}
}