<head>
<title></title>
<script type="text/javascript">
onload = function () {
document.getElementById('btn').onclick = function () {
//这个是获取这个页面中所有的tr
// var trs= document.getElementsByTagName('tr');
//获取指定的表中的tr
var trs = document.getElementById('tb').getElementsByTagName('tr');
for (var i = 0; i < trs.length; i++) {
if (i % 2 == 0) {
trs[i].style.backgroundColor = '';//默认颜色
} else {
trs[i].style.backgroundColor = 'yellow';
}
}
};
};
</script>
</head>
<body>
<input type="button" name="name" value="表格隔行变色" id="btn" />
<table border="1" id="tb">
<tr>
<td>周润发
</td>
<td>刘德华
</td>
<td>周星驰
</td>
</tr>
<tr>
<td>周润发
</td>
<td>刘德华
</td>
<td>周星驰
</td>
</tr>
<tr>
<td>周润发
</td>
<td>刘德华
</td>
<td>周星驰
</td>
</tr>
<tr>
<td>周润发
</td>
<td>刘德华
</td>
<td>周星驰
</td>
</tr>
<tr>
<td>周润发
</td>
<td>刘德华
</td>
<td>周星驰
</td>
</tr>
<tr>
<td>周润发
</td>
<td>刘德华
</td>
<td>周星驰
</td>
</tr>
</table>
</body>