代码修改后的版本，全部提交

Mtxfw.VipSite/Scripts/fudong.js

@@ -0,0 +1,33 @@
+function FloatDiv(id) {
+    this.ID = id;
+    this.ObjMove = document.getElementById(id);
+    this.LastScrollY = 0; // 已经移动
+    FloatDiv.prototype.Move = function (obj) {
+        var scrollTop;
+        if (document.documentElement && document.documentElement.scrollTop)
+            scrollTop = document.documentElement.scrollTop;
+        else if (document.body)
+            scrollTop = document.body.scrollTop;
+        var percent; // 本次移动像素
+        percent = (scrollTop - obj.LastScrollY) * 0.1; // 每次移动10%
+        if (percent > 0) percent = Math.ceil(percent); // 截掉小数，数字会变大
+        else percent = Math.floor(percent); // 截掉小数，数字会变小
+        obj.ObjMove.style.top = parseInt(obj.ObjMove.style.top) + percent + 'px';
+        obj.LastScrollY = obj.LastScrollY + percent;
+    };
+    FloatDiv.prototype.Init = function (obj) {
+        if (!obj.ObjMove) {
+            alert('对象不存在');
+            return;
+        }
+        window.setInterval(this.BindInterval(this.Move, obj), 10);
+    };
+    // 绑定参数，window.setInterval，不能指定参数，需要绑定
+    FloatDiv.prototype.BindInterval = function (funcName) {
+        var args = [];
+        for (var i = 1; i < arguments.length; i++) {
+            args.push(arguments[i]);
+        }
+        return function () { funcName.apply(this, args); }
+    };
+}