为什么一颗星星都不亮，但是也不报错？
<script>
var rating = (function(){
//点亮整颗
var LightEntire = function(el,options){
this.$el = $(el);
this.$item = this.$el.find("rating-item");
this.opts = options;
};
LightEntire.prototype.init = function(){
this.lightOn(this.opts.num);
this.bindEvent();
};
LightEntire.prototype.lightOn = function(num){
num = parseInt(num);
this.$item.each(function(index){
if(index < num){
$(this).css("background-position",'0 -67px');
}else{
$(this).css("background-position",'0 0');
}
});
};
LightEntire.prototype.bindEvent = function(){
var self = this;
self.$el.on("mouseover",".rating-item",function(){
self.lightOn($(this).index() + 1);
}).on('click',".rating-item",function(){
self.opts.num = $(this).index()+1;
}).on("mouseout",function(){
self.lightOn(self.opts.num);
})
};
//默认参数
var defaults = {
num:0,
readOnly:false,
select:function(){},
chosen:function(){}
};
//初始化
var init = function(el,options){
options = $.extend({},defaults,options);
new LightEntire(el,options).init();
};
return {init:init}
})();
rating.init("#rating",{
num:2
});
</script>对照了两遍，没有找到哪里写错了，求帮帮忙
