<!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_previouSibling(n){ var a=n.previouSibling; while(a.previouSibling!=1){ a=a.previouSibling; } return a; } var a=document.getElementsByTagName("li")[1]; document.write(a.nodeName); document.write("="); document.write(a.innerHTML); b=get_previouSibling(a); document.write("<br />"+"<br />"); document.write(b.nodeName); document.write("="); document.weite(b.innerHTML);</script></body></html>
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千秋此意
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function get_previouSibling(n) {
var a = n.previousSibling;
while (a.nodeType !== 1) {
a = a.previousSibling;
}
return a;
}
var a = document.getElementsByTagName("li")[1];
document.write(a.nodeName);
document.write("=");
document.write(a.innerHTML);
b = get_previouSibling(a);
document.write("<br />" + "<br />");
document.write(b.nodeName);
document.write("=");
document.write(b.innerHTML);两个地方单词拼错了 previouSibling 应该是 previousSibling
最后一行的 write 写成了 weite
while(a.previouSibling!=1)
改成了while (a.nodeType !== 1)
node对象的的nodeType属性=1时表示该对象是元素节点
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