修改缩放html页面时悬浮框位置显示不正确的BUG

app/views/courses/_course_ad.html.erb

@@ -49,6 +49,7 @@
        }
        $("#floatpoint").css("top",YY);
    }
-    //$("#floatpoint").css("left",screen_width/2+body_width/2+5);
-   $(document).ready(function(){var body_width = $("#top-menu").width(); $("#floatpoint").css("left",screen_width/2+body_width/2+10);});
+   function change_size(){var body_width = $("#top-menu").width(); $("#floatpoint").css("left",screen_width/2+body_width/2+10);}
+   $(document).ready(function(){change_size();});
+   $(window).resize(function(){screen_width = $(window).width();change_size();});
 </script>