<!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?get_nextSibling(n){
????//?????var?x=n.nextSibling;
????//?????while?(x?&&?x.nodeType!=1){
????//?????????x=x.nextSibling;
????//?????}
????//?????return?x;
????//?}
????//?var?x=document.getElementsByTagName("li")[0];
????//?document.write(x.nodeName);
????//?document.write("?=?");
????//?document.write(x.innerHTML);
????
????//?var?y=get_nextSibling(x);
????
????//?if(y!=null){
????//?????document.write("<br?/>nextsibling:?");
????//?????document.write(y.nodeName);
????//?????document.write("?=?");
????//?????document.write(y.innerHTML);
????//?}else{
????//???document.write("<br>已經是最后一個節(jié)點");??????
????//?}
?//任務部分???
????function?get_previousSibling(a){
????????var?b?=a.previousSibling;
????????while?(b?&&?b?!=?1){
????????????b?=?b.previousSibling;
????????}
????????return?b;
????}
????var?b?=?document.getElementsByTagName("li")[4];
????document.write(b.nodeName+"="+b.innerHTML+"<br>");
?????var?z?=get_previousSibling(b);
?????if(z!=null){
?????????document.write("previousSibling:"+z.nodeName+"="+z.innerHTML);
?????}
?????else?{
?????????document.write("這是第一個節(jié)點了");
?????}
</script>
</body>
</html>
2016-07-17
?while (b && b.nodeType!= 1){
? ? ? ? ? ? b = b.previousSibling;
? ? ? ? }
少了b.nodeType ?這個的值是數字 才可以進行判斷
2016-07-17
給函數傳參，獲取你要顯示的內容