好的，TreeWalker遍历的另一个例子是巩固我们对它的理解：

<p id=

"essay"

>George<span> loves </span> <b>JavaScript!</b></p><font></font>

<font></font>

<script type=

"text/javascript"

><font></font>

<font></font>

var

rootnode=document.getElementById(

"essay"

)<font></font>

var

walker=document.createTreeWalker(rootnode, NodeFilter.SHOW_TEXT, 

null

, 

false

)<font></font>

<font></font>

walker.firstChild() 

//Walk to first child node (the text "George")<font></font>

var

paratext=walker.currentNode.nodeValue<font></font>

while

(walker.nextSibling()){ 

//Step through each sibling of "George"<font></font>

paratext+=walker.currentNode.nodeValue<font></font>

}<font></font>

<font></font>

alert(paratext) 

//alerts "George loves JavaScript!"<font></font>

<font></font>

</script>

ITPub博客

DOM的TreeWalker对象简介（6）

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