JS实现评价打分

时间：2011-04-19 来源：June拼搏

HTML代码：

<html>
<head>
<title>Rating</title>
<script>
function indexOf(arr,element){
        for(var i=0;i<arr.length;i++){
                if(arr[i]==element){
                        return i;
                }
        }
}
function InitEvent(){
        var tds = document.getElementById("rating").getElementsByTagName("td");
        for(var i =0; i<tds.length;i++){
        
                tds[i].style.cursor="pointer";
                tds[i].onmouseover=function(){
                        var tds=document.getElementById("rating").getElementsByTagName("td");
                        var index = indexOf(tds,this);
                        rating.setAttribute("Rate",index+1);//属性Rate用于click时显示分数
                        for(var i=0;i<=index;i++){
                                tds[i].innerText = '★'; 
                        }
                        for     (var i=index+1;i<tds.length;i++){
                                tds[i].innerText = '☆';
                        }
                };
                tds[i].onclick=function(){
                        var rating = document.getElementById("rating"); 
                        alert("您给出的分数是："+rating.getAttribute("Rate"));
                };
        }
}
</script>
</head>

<body onload="InitEvent();">
<table id="rating">
<tr style="color:Red"><td>☆</td><td>☆</td><td>☆</td><td>☆</td><td>☆</td></tr>
</table>
</body>
</html>

运行结果图：