$.ajax({

    url:url,                                                  $(dlgId).load(url);
    type:'post',                                              $(dlgId).dialog('open');
    dataType:'html',
    error:function(){
        $.boxUtil.alert("请求异常");
    },
    success:function(data){    
            $(dlgId).html(data);
            $(dlgId).dialog('open');
    }

});
data returns a page. Loading $("...").width() in HTML will report an error.
The url is the request address, and the return is also a page. In the load loading page, the $("...").width() method works just fine, I don't know why