复制代码代码如下:
<html xmlns = "http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv = "content-type" content = "text /html; charset = utf-8" />
<title> js 取模隔行变色 </title>
<script type = "text/javascript">
window.onload = function ()
{
var oul = document.getElementById ('ul1');
var ali = Oul.getElementsByTagName ('li');
for (var i = 0; i <ali .Length; i ++)
{
if (i%2 == 0) // 取模 求余数
{
ali [i] .style.background = 'vermelho';
}
}
}
</script>
</script> </ad Head>
<Body>
<ul id = "ul1">
<li> webtall </li>
<li> webtall </li>
<li> webtall </li>
<li> webtall </li>
<li> webtall </li>
</ul>
</body>
</html>