Javascript递归打印Document层次关系实例分析

时间:2020-05-13 永远爱好写程序人气:0

本文实例讲述了Javascript递归打印Document层次关系的方法。分享给大家供大家参考。具体如下：

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>递归显示节点层次关系</title>
<script type="text/javascript">
var ResultStr = "";
function ListNode(node,level) {
 PrintInfo(node, level);
 level++;
 var nodes = node.childNodes;
 for (var i = 0; i < nodes.length; i++) {
  if (nodes[i].hasChildNodes()) {
   ListNode(nodes[i], level); //递归
  }
  else {
   PrintInfo(nodes[i], level);
  }
 }
}
function getSpace(level) {
 var s = "";
 for (var i = 0; i < level; i++) {
  s+="!----"
 }
 return s;
}
function PrintInfo(node, level) {
 ResultStr += getSpace(level) + "Name:" + node.nodeName + 
 "...Type:" + node.nodeType + "...Value:" + node.nodeValue + "<br />";
}
function getDocAllInfo() {
 ResultStr = "";
 ListNode(document, 0);
 document.write(ResultStr);
}
</script>
</head>
<body>
<input type="button" value="测试" onclick="getDocAllInfo()" />
<div id="divDemo">div内容</div>
<table>
  <tr>
    <td>单元格1</td>
    <td>单元格2</td>
  </tr>
  <tr>
    <td>单元格3</td>
    <td>单元格4</td>
  </tr>
</table>
<input type="text" />
<span>我是SPAN</span>
<!--我是注释-->
</body>
</html>

希望本文所述对大家的javascript程序设计有所帮助。

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