function roll_heart (id, bul){
	imgover = "/images/ico02_selected.gif";
	imgout = "/images/ico02_unselected.gif";
	if (bul) {
		for (i = 1; 	i <= id;	i++){
			document.getElementById('heart_'+i).src = imgover;
		}
	}else{
		for (i = 1; 	i <= id;	i++){
			document.getElementById('heart_'+i).src = imgout;
		}
	}
}