滑动过快时状态切换不及的bug

@@ -85,36 +85,34 @@ exports.init = function() {
         containerH = container.height(); //article-type-three高度
         containerTop = container.offset().top; //article-type-three offset top
 
+        function resetStatus() {
+            thumbContainer.removeClass('static fixed-top fixed-bottom absolute').css('top', '');
+            prodList.css('margin-top', '');
+        }
+
         //scroll时控制列表的位置
         $(document).scroll(function() {
             var sTop = $(this).scrollTop();
-
+            resetStatus();
             //Tip: removeClass只用移除相邻状态即可
             if (sTop <= containerTop - wH + tContainerH) {
                 thumbContainer
-                    .addClass('fixed-bottom')
-                    .removeClass('static');
+                    .addClass('fixed-bottom');
                 prodList.css({
                     'margin-top': tContainerH
                 });
             } else if (sTop <= containerTop) {
                 thumbContainer
-                    .addClass('static')
-                    .removeClass('fixed-bottom fixed-top')
-                    .css('top' , '');
-                prodList.removeAttr('style')
+                    .addClass('static');
             } else if (sTop <= containerTop + containerH - tContainerH) {
                 thumbContainer
-                    .addClass('fixed-top')
-                    .removeClass('static absolute')
-                    .css('top' , '');
+                    .addClass('fixed-top');
                 prodList.css({
                     'margin-top': tContainerH
                 });
             } else if (sTop <= containerTop + containerH) {
                 thumbContainer
                     .addClass('absolute')
-                    .removeClass('static fixed-top')
                     .css({
                         top: containerTop + containerH - tContainerH
                     });
@@ -123,10 +121,7 @@ exports.init = function() {
                 });
             } else if (sTop > containerTop + containerH) {
                 thumbContainer
-                    .addClass('static')
-                    .removeClass('absolute')
-                    .css('top' , '');
-                prodList.removeAttr('style');
+                    .addClass('static');
             }
         });