easyui layout 布局title

<script>
function aclick(){
$("a").click(function () {
var name=this.innerHTML;
$($("#mainFrm").prev()[0]).html(name);
//$("#mainFrm")
});
}
</script>

<!--主窗体-->
<div id="mainFrm" data-options="region:'center',title:'主窗体',iconCls:'icon-remove'" style="overflow: hidden;">
<iframe id="content" runat="server" name="content" style="width: 100%; height: 100%; margin: 0; padding: 0;"></iframe>
</div>