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javascript DOM2寻找选择文字路径

2009-09-11 00:31  BlueDream  阅读(411)  评论(0)    收藏  举报
今天在CSDN遇到个帖子,需要得到选中元素的所属DOM结点层次.代码主要涉及的DOM2的几个点.
看下代码就知道了:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title> new document </title>
  <script type="text/javascript">
    function ShowDirection() {
        var tbl = [];
        var direct = (document.selection && document.selection.createRange) 
                                         ? document.selection.createRange().parentElement() // IE
                                         : window.getSelection().focusNode.parentNode;        // FF
        do
        {
            tbl.push(direct.tagName);
        }
        while((direct = direct.parentNode) && (direct !== document.documentElement));
        alert(tbl.reverse().join('---->'))            
    }
  </script>
 </head>

 <body>
 <div>123 
    <p>456 
        <span>789 
                <b>bbbbb </b> 
        </span> 
    </p> 
 <input type="button" value="ShowDirection" onclick="ShowDirection()" />
 </body>
</html>