easyui 如何隐藏thead

easyui 怎么隐藏thead?

<table id="Qulitycheckbasic" class="easyui-datagrid" style="width:690px;height:auto;data-options="url:'datagrid_data.json',fitColumns:true,singleSelect:true" title="基本信息">  
			    <thead>  
				    <tr>  
				        <th field="name1" width="70"></th>
				        <th field="name2" width="190"></th>
				        <th field="name3" width="80"></th>
				        <th field="name4" width="190"></th>
				        <th field="name5" width="150"></th>
				    </tr>  
				</thead>                            
			    <tbody>
                           </tbody>

我想把thead隐藏掉,但是没有还不行.请问怎么处理?
------解决思路----------------------
url:'datagrid_data.json',fitColumns:true,singleSelect:true,showHeader:false