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关于dhtmlxtree打开所有节点的有关问题

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Release： 2016-06-13 10:03:41
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关于dhtmlxtree打开所有节点的问题
我有一个链接展开，想用这个打开所有节点，点击之后页面上只返回了一个0，请问高手这是怎么回事啊？还有其他方法打开树的所有节点吗？ 
为什么收缩可以实现收缩，展开却不行呢？

------解决方案--------------------
贴代码..

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