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<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>各行换色</title>
<script type="text/javascript">
function show() {
var tab = document.getElementById("tab");
var tr = tab.getElementsByTagName("tr");
for (var i = 0; i < tr.length; i++) {
if (i % 2 == 0) {
tr[i].style.backgroundColor = "#ccc";
tr[i].onmouseover = function () { this.style.background = "red" };
tr[i].onmouseout = function () { this.style.background = "#ccc" }
} else {
tr[i].style.backgroundColor = "#fff";
tr[i].onmouseover = function () { this.style.background = "red" };
tr[i].onmouseout = function () { this.style.background = "#fff" }
}
}
}
window.onload = show;
</script>
</head>
<body>
<table id="tab">
<tr>
<td>
11111111111
</td>
<td>
22222222222
</td>
</tr>
<tr>
<td>
33333333333
</td>
<td>
44444444444
</td>
</tr>
<tr>
<td>
555555555555
</td>
<td>
66666666666
</td>
</tr>
<tr>
<td>
77777777777
</td>
<td>
88888888888
</td>
</tr>
<tr>
<td>
99999999999
</td>
<td>
00000000000
</td>
</tr>
</table>
</body>
</html>
?运行效果：
