新手请教个关于DhtmlxTree的问题！
以下是所有的代码(所有原代码都在包里)：
<html>
<head>
<title>Tree</title>
<style>
body {font-size:12px}
.{font-family:arial;font-size:12px}
h1 {cursor:hand;font-size:16px;margin-left:10px;line-height:10px}
xmp {color:green;font-size:12px;margin:0px;font-family:courier;background-color:#e6e6fa;padding:2px}
.hdr{
background-color:lightgrey;
margin-bottom:10px;
padding-left:10px;
}
</style>
<link rel="stylesheet" type="text/css" href="Css/dhtmlXTree.css"/>
<script src="JavaScript/dhtmlXCommon.js"></script>
<script src="JavaScript/dhtmlXTree.js"></script>
</head>
<body>
<div class="hdr">DHTML JavaScript Tree samples</div>
<table>
<tr>
<td valign="top">
<div id="MainMenuTreeBox_Tree" style="width:250; height:418;background-color:#f5f5f5;border :1px solid Silver;; overflow:auto;"></div>
</td>
<td style="padding-left:25" valign="top">Three state checkboxes<br><br>
<a href="javascript:void(0);" onclick="tree.setCheck(tree.getSelectedItemId(),true);">Check item</a><br><br>
<a href="javascript:void(0);" onclick="tree.setCheck(tree.getSelectedItemId(),false);">UnCheck item</a><br><br>
<a href="javascript:void(0);" onclick="alert(tree.getAllChecked());">Get list of checked</a><br><br>
<a href="javascript:void(0);" onclick="catchValue();">Write checked</a><br><br>
<br>
</td>
</tr>
</table>
<hr>
<script>
tree=new dhtmlXTreeObject("mainMenuTreeBox_Tree","100%","100%",0);
tree.setImagePath("Images/");
tree.enableCheckBoxes(1);
tree.enableThreeStateCheckboxes(true);
//tree.enableDragAndDrop(true);
//可动态进行改变树级目录
tree.loadXML("XmlFile/mainMenuTree.xml");
</script>
<br><br>
<p><a href="javascript:self.close()">Close this page</a></p>
</body>
</html>
<script type="text/javascript" language="javascript">
<!--
function catchValue()
{
var valueData=tree.getSelectedItemText();
alert(valueData);
var checked=tree.getAllChecked();
/*******************************问题处*******************************************
在这里怎样才能把checked这个字符串中以逗号为分割的字符进行拆解，或者说是怎样可以
直接得到各个根接点以及根接点下字节点的值，比如说用循环的方式来处理。在这里应该怎样写啦！
我看他的开发文档中好象不支持去取单个接点的值啦！！我用的是他的标准版！！！
*********************************************************************************/
alert(checked);
}
//全部展开或者全部收缩
//-->
</script>
望熟悉使用过这个控件的Jser帮个忙啦！！
在下感激溜涕啦！！！
<html>
<head>
<title>Tree</title>
<style>
body {font-size:12px}
.{font-family:arial;font-size:12px}
h1 {cursor:hand;font-size:16px;margin-left:10px;line-height:10px}
xmp {color:green;font-size:12px;margin:0px;font-family:courier;background-color:#e6e6fa;padding:2px}
.hdr{
background-color:lightgrey;
margin-bottom:10px;
padding-left:10px;
}
</style>
<link rel="stylesheet" type="text/css" href="Css/dhtmlXTree.css"/>
<script src="JavaScript/dhtmlXCommon.js"></script>
<script src="JavaScript/dhtmlXTree.js"></script>
</head>
<body>
<div class="hdr">DHTML JavaScript Tree samples</div>
<table>
<tr>
<td valign="top">
<div id="MainMenuTreeBox_Tree" style="width:250; height:418;background-color:#f5f5f5;border :1px solid Silver;; overflow:auto;"></div>
</td>
<td style="padding-left:25" valign="top">Three state checkboxes<br><br>
<a href="javascript:void(0);" onclick="tree.setCheck(tree.getSelectedItemId(),true);">Check item</a><br><br>
<a href="javascript:void(0);" onclick="tree.setCheck(tree.getSelectedItemId(),false);">UnCheck item</a><br><br>
<a href="javascript:void(0);" onclick="alert(tree.getAllChecked());">Get list of checked</a><br><br>
<a href="javascript:void(0);" onclick="catchValue();">Write checked</a><br><br>
<br>
</td>
</tr>
</table>
<hr>
<script>
tree=new dhtmlXTreeObject("mainMenuTreeBox_Tree","100%","100%",0);
tree.setImagePath("Images/");
tree.enableCheckBoxes(1);
tree.enableThreeStateCheckboxes(true);
//tree.enableDragAndDrop(true);
//可动态进行改变树级目录
tree.loadXML("XmlFile/mainMenuTree.xml");
</script>
<br><br>
<p><a href="javascript:self.close()">Close this page</a></p>
</body>
</html>
<script type="text/javascript" language="javascript">
<!--
function catchValue()
{
var valueData=tree.getSelectedItemText();
alert(valueData);
var checked=tree.getAllChecked();
/*******************************问题处*******************************************
在这里怎样才能把checked这个字符串中以逗号为分割的字符进行拆解，或者说是怎样可以
直接得到各个根接点以及根接点下字节点的值，比如说用循环的方式来处理。在这里应该怎样写啦！
我看他的开发文档中好象不支持去取单个接点的值啦！！我用的是他的标准版！！！
*********************************************************************************/
alert(checked);
}
//全部展开或者全部收缩
//-->
</script>
望熟悉使用过这个控件的Jser帮个忙啦！！
在下感激溜涕啦！！！