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事件onmouseover
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<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;}
</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>
</div>
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