var add = ""; 
var rating;
//(navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.indexOf("7.") == -1) ? "_ie6" : "";

function mark(obj) {
	while( obj && obj.tagName == "LI") {
		if(obj.className != "rating_set") {
			obj.className = "rating_hover" + add;
		} else {
			obj.className = "rating_set_hover" + add;
		}
		obj = obj.previousSibling;
	}
}

function unmark(obj) {
	while(obj && obj.tagName == "LI") {
		if(obj.className == "rating_hover") {
			obj.className = "rating" + add;
		}	else {
			obj.className = "rating_set" + add;
		}
		obj = obj.previousSibling;
	}
}

function setGrades(obj, bookid) {
	var sibling = obj.nextSibling;
	rating = 0;
	while(sibling && sibling.tagName == "LI") {
		sibling.className = "rating" + add;
		sibling = sibling.nextSibling;
	}
	
	while(obj && obj.tagName == "LI") {
		rating++;
		obj.className = "rating_set" + add;
		obj = obj.previousSibling;
	}
}