function setStars(num) {
	document.getElementsByName('rating')[0].value = num;
	showStars(num);
	
	if(num == 0)
		document.getElementById('rem_stars').style.visibility = 'hidden';
	else
		document.getElementById('rem_stars').style.visibility = 'visible';
}

function showStars(num) {
	for(var i=1; i<= num; i++)
		document.getElementById('star'+i).src = document.getElementById('star'+i).src.replace(/\/grey_star.png$/,'/star.png');
	for(var i=(num+1); i<= 5; i++)
		document.getElementById('star'+i).src = document.getElementById('star'+i).src.replace(/\/star.png$/,'/grey_star.png');
}

function resetStars() {
	num = document.getElementsByName('rating')[0].value*1;
	showStars(num);
}