ect one node and click edit button to perform editing.</p>
	<div style="margin:20px 0;">
		<a href="javascript:void(0)" class="easyui-linkbutton" onclick="edit()">Edit</a>
		<a href="javascript:void(0)" class="easyui-linkbutton" onclick="save()">Save</a>
		<a href="javascript:void(0)" class="easyui-linkbutton" onclick="cancel()">Cancel</a>
	</div>
	<table id="tg" class="easyui-treegrid" title="Editable TreeGrid" style="width:700px;height:250px"
			data-options="
				iconCls: 'icon-ok',
				rownumbers: true,