var url = "www.baidu.com";
//var content = '<iframe scrolling="no" frameborder="0" src="'+url+'" style="100%;height:100%;"></iframe>';
alert(content);
$('#p').panel({
content:cerateContent(content)
});
<div id="p" class="easyui-panel" title="统计数据" style="padding:20px;background:#fafafa;" data-options="cache:false,fit:true,border:false">
</div>
function cerateContent(content){
var s = '<ifr'+'ame id="__mainFrame" scrolling="auto" frameborder="0" src="'+url+'" style="100%;height:100%;"></ifr'+'ame>';
return s;
}