window.onload = function(){
    var star = document.getElementById('star');
    var ul = star.getElementsByTagName('ul')[0];
    var li = star.getElementsByTagName('li');
    var span = star.getElementsByTagName('span')[1];
    var p = star.getElementsByTagName('p')[0];
    var evl = ["很不满意|差得太离谱，与卖家描述的严重不符，非常不满",
                "不满意|部分有破损，与卖家描述的不符，不满意",
                "一般|质量一般，没有卖家描述的那么好",
                "满意|质量不错，与卖家描述的基本一致，还是挺满意的",
                "非常满意|质量非常好，与卖家描述的完全一致，非常满意"];
    var iStar = iArg = 0;
    for(i = 1;i <= li.length;i++){
        li[i-1].point = i;
        li[i-1].onmouseover = function(){
            fnPoint(this.point);
            p.style.left = ul.offsetLeft + this.point * this.offsetWidth - 104 + 'px';
            p.innerHTML = '<em><b>'+this.point+'分</b>'+ evl[this.point-1].match(/(.+)\|/)[1] + '</em>' + evl[this.point-1].match(/\|(.+)/)[1];
            p.style.display = 'block';
        }
         
        li[i-1].onclick = function(){
            iStar = this.point;
            p.style.display = 'none';
            span.innerHTML = '<strong>'+this.point+'分'+'</strong>'+'('+evl[this.point-1].match(/\|(.+)/)[1]+')';
             
        }
         
        li[i-1].onmouseout = function(){
            fnPoint();             //可以传参数
            p.style.display = 'none';
        }
    }
     
    function fnPoint(iArg){
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        for(i =1;i <=li.length;i++){
            li[i-1].className = score < i?'':'on';
        }
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}