为什么我的还是移出后没有恢复？
$(document).ready(function(){
    $(function(){
        var iconH = $(".sprite").find("s").height();/*获取高度*/
            //console.log(iconH);打印iconH的高
            //声明一个变量获取li元素
             triggerLi = $(".sprite").children("li");
            //输入li的索引值（它是从0开始的）
            triggerLi.each(function(){
            var $this = $(this),//声明li变量
                $index =$this.index();//声明一个变量并获取li的值索引值
                //console.log($index)每个li的索引值
                 // console.log(iconH*$index);1*40
                 $this.children("s").css("background-position","0 -"+ iconH*$index +"px")
                 
                 $this.hover(function(){
                    //鼠标移入
                    $this.children("s").css("background-position","-24px -"+ iconH*$index +"px")
                 }),function(){
                    //鼠标移出
                    $this.children("s").css("background-position","0 -"+ iconH*$index +"px")
                 };
 
         })
    });
    
});