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：
