eayui js动态加载Datagrid,自适应宽度,高度

<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],
})