js取模（求余数）隔行变色

时间:2020-05-13 人气:0

<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='red';
  }
}
}
</script>
</script></head>
<body>
<ul id="ul1">
<li>webtall</li>
    <li>webtall</li>
    <li>webtall</li>
    <li>webtall</li>
    <li>webtall</li>
</ul>
</body>
</html>

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