<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>nextSibling</title>
</head>
<body>
<ul id="u1">
<li id="a">javascript</li>
<li id="b">jquery</li>
<li id="c">html</li>
</ul>
<ul id="u2">
<li id="d">css3</li>
<li id="e">php</li>
<li id="f">java</li>
</ul>
<script type="text/javascript">
function add(x){
var A=document.getElementsByTagName("li")
var B=A[x].nextSibling
while(B.nodeType!=1){
B=B.nextSibling
}
return B;
}
var C=add(2)
document.write(C.innerHTML)
</script>
</body>
