<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8">
<title>無標(biāo)題文檔</title>
</head>
<body>
<div>
??javascript??
??<p>javascript</p>
??<div>jQuery</div>
??<h5>PHP</h5>
</div>
<script?type="text/javascript">
?var?x=document.getElementsByTagName("div")[0].childNodes;
?for(i?in?x){
?????document.write(x[i].nodeName+x[i].nodeType+x[i].nodeValue+"<br>")
?????}
?
?
</script>
</body>
</html>結(jié)果是這樣的javascriptjavascriptjQueryPHP#text3 javascript?P1null#text3?DIV1null#text3?H51null#text3?NaNNaN
為什么我的有9個(gè)子項(xiàng)，最后兩個(gè)NaN是什么東西？？？
慕粉3442477
2016-11-23 19:52:14
