<div class="easyui-layout" style="min-height:100%;min-width:100%;">

<div id="gridData" class="region:'center',easyui-datagrid" ></div>

</div>

$("#datagrid").datagrid({

            fit: true,

            fitColumns: true,

            striped: true,

            border: false,

            rownumbers: true,

            pagination: true,

            toolbar: "#toolbarid",

            columns: [columns],

        })