easyui datagrid无横向滚动条

两个设置一模一样的datagrid，一个可以出现横向滚动条，一个不可以。

$(function(){
    $('#dg_id').datagrid({
        title:'test_1',
        // iconCls:'icon-edit',
        width:800,
        method:'get',
        height:250,
        striped:true,
        toolbar:'#add_c',
        singleSelect:true,
        // idField:'itemid',
        rownumbers:true,
        onDblClickRow:editrow_c,

    });
(function(){
    $('#dg_id_2').datagrid({
        title:'test_2',
        // iconCls:'icon-edit',
        width:800,
        method:'get',
        height:250,
        striped:true,
        toolbar:'#add_java',
        singleSelect:true,
        // idField:'itemid',
        rownumbers:true,
        onDblClickRow:editrow_java,

    });

最终发现将toolBar所在的div中的style去掉就可以了，具体原因不清楚

<div style="margin-bottom:20px">
				<table id="dg_id_2"></table>

				<div id="add_c"style="margin:10px 0">
					<a  href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-add',plain:true" οnclick="append_c()">添加</a>
					<a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-remove',plain:true" οnclick="removeit_c()">删除</a>
					<a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-save',plain:true" οnclick="acceptit_c()">保存</a>
					<a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-undo',plain:true" οnclick="reject_c()">撤销</a>
					<a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-search',plain:true" οnclick="getChanges_c()">GetChanges</a>
				</div>
		</div>