javascript

Js module (remainder) alternate color

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js Change color by taking the die and spacing </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)  //Take the modulus and find the remainder
  {
   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>