text: <div class="apiDetail">
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  	<h2><span>Boolean</span><span class="path">treeNode.</span>isFirstNode</h2>
  	<h3>Overview<span class="h3_info">[ depends on <span class="highlight_green">jquery.ztree.core</span> js ]</span></h3>
  	<div class="desc">
  		<p></p>
  		<div class="longdesc">
  			<p>Judge whether the node is the sibling nodes's first node.</p>
  			<p class="highlight_red">If you use the 'exhide' pack, so this attribute will only support the node which be shown. </p>
  			<p class="highlight_red">Do not initialize or modify it, it is created by the zTree.</p>
  		</div>
  	</div>
  	<h3>Boolean Format</h3>
  	<div class="desc">
  	<p> true means: the node is first node.</p>
  	<p> false means: the node is not first node.</p>
  	<p class="highlight_red">If the node has been hidden, isFirstNode = false</p>
  	</div>
  	<h3>Examples of treeNode</h3>
  	<h4>1. Judge whether the first selected node is the sibling nodes's first node.</h4>
  	<pre xmlns=""><code>var treeObj = $.fn.zTree.getZTreeObj("tree");
  var sNodes = treeObj.getSelectedNodes();
  if (sNodes.length > 0) {
  	var isFirstNode = sNodes[0].isFirstNode;
  }
  </code></pre>
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