success: function(res) {
                 var iframe = $(res).find('iframe');;
                 var Height=iframe[0].contentDocument.body.offsetHeight+50
                 iframe.css('height', Height);
                 $(res).css('top', (window.innerHeight - Height - 100) / 2); 
               if(window.innerWidth>1000) {
                  //如果屏幕大于1000，固定尺寸
                  $(res).css('width', '510');
                  iframe.css('width', '500');
                  $(res).css('left', (window.innerWidth - 510) / 2);
               }else{
                  $(res).css('width', '80%');
                  iframe.css('width', '80%');
                  $(res).css('left', '10%');
               }