<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JavaScript星级评分</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.wrapper {
height: 20px;
padding: 5px;
width: 130px;
margin: 100px auto 10px;
}
tr,
td {
font-size: 66px;
color: #000000;
background: #ffffff;
}
</style>
<script type="text/javascript">
function ArrayIndexOf(arr, element) {
for(var i = 0; i < arr.length; i++) {
if(arr[i] == element) {
return i;
}
}
return -1;
}
function GetTds() {
var tbl = document.getElementById("tblMain");
var tds = tbl.getElementsByTagName("td");
return tds;
}
function InitEvent() {
var tds = GetTds();
for(var i = 0; i < tds.length; i++) {
var td = tds[i];
td.onmouseover = TdOnclick;
td.style.cursor = "pointer";
}
}
function TdOnclick() {
var tds = GetTds();
var index = ArrayIndexOf(tds, this);
for(var i = 0; i <= index; i++) {
var td = tds[i];
td.innerHTML = "★";
}
for(var j = index + 1; j < tds.length; j++) {
var td = tds[j];
td.innerHTML = "☆";
}
}
</script>
</head>
<body onload="InitEvent()" class="wrapper">
<table id="tblMain">
<tr>
<td>☆</td>
<td>☆</td>
<td>☆</td>
<td>☆</td>
<td>☆</td>
</tr>
</table>
</body>
</html>
原文：http://www.cnblogs.com/libin-1/p/6280196.html