easyui datagrid设置fit: true后，页面显示不全的情况

<div id="tb">
<div style="float:left;">
<a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-add',plain:true" onclick="javascript: addServer();">新建</a>
</div>
<div style="float:right;">
游戏ID: <input id="gameId" class="easyui-validatebox textbox" style="width:120px">
IP地址: <input id="ip" class="easyui-validatebox textbox" style="width:120px">
<a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-search',plain:true" onclick="javascript: searchServer();">搜索</a>
</div>
</div>