移动端滑动函数 （防止滑动时将隐藏部分显示）

<ul class="goodsUl" id="goodsUl" style="width: 724.375px; margin-left: 0px;">
                                <li class="oneGoods" style="width: 142.5px; height: 137.75px; padding-top: 2.96875px;">
                                        <a href="/Mjf/Goods/goodsDetail/goodsId/18/skuId/29/shopId/96.html" class="goodsImg" style="width: 142.5px; height: 108.656px;">
                                            <!--<img src="/Public/wap/images/m-home-pic-new.png" data-src="/Public/wap/images/goods1.png">-->
                                            <img src="/Public/wap/images/m-home-pic-new.png" data-src=" " style="width: 142.5px; height: 108.656px;">
                                        </a>
                                        <div class="goodsInfo">
                                            <div class="inGroupGoods"><span>0</span>件已参团</div>
                                            <div class="goodsPrice">￥<span>5555.00</span></div>
                                        </div>
                                    </li>
　　　　　　　　　　　　　　　　　　<li class="oneGoods" style="width: 142.5px; height: 137.75px; padding-top: 2.96875px; margin-left: 2.96875px;">
                                        <a href="/Mjf/Goods/goodsDetail/goodsId/1/skuId/1/shopId/96.html" class="goodsImg" style="width: 142.5px; height: 108.656px;">
                                            <!--<img src="/Public/wap/images/m-home-pic-new.png" data-src="/Public/wap/images/goods1.png">-->
                                            <img src="http://ing.com/o_1bvjbnqkh1tub1utdrsdj3dt21p.jpg" data-src="" style="width: 142.5px; height: 108.656px;">
                                        </a>
                                        <div class="goodsInfo">
                                            <div class="inGroupGoods"><span>0</span>件已参团</div>
                                            <div class="goodsPrice">￥<span>2545.00</span></div>
                                        </div>
                                    </li>
                                    

                            </ul>

//滑动函数
     function SlideHorizontal(id ){
         this.id = id;
         this.startX = 0;
         this.moveX = 0;
         this.endX = 0;
         this.startMarginLeft = 0;
         this.speed = 0;
         this.moveHappen = false;
         this.vertical = 0;
         this.mouseStart = false;
         var scope = this;
         $("#" + this.id).on("touchstart",function(e){
             scope.mouseStart = true;
             touchStartFn(e);
         });
         $("#" + this.id).on("mousedown",function(e){
             scope.mouseStart = true;
             touchStartFn(e);
         });
         $("#" + this.id).on("touchmove",function(e){
             touchMoveFn(e);
         });
         $("#" + this.id).on("mousemove",function(e){
             touchMoveFn(e);
         });
         $("#" + this.id).on("touchend",function(e){
             scope.mouseStart = false;
             touchEndFn(e);
         });
         $("#" + this.id).on("mouseup",function(e){
             scope.mouseStart = false;
             touchEndFn(e);
         });

         function touchStartFn(e){
             if (e.clientX) {
                 scope.moveX = scope.startX = e.clientX;
                 scope.startY = e.clientY;
             }else{
                 var touch = e.originalEvent.changedTouches[0];
                 scope.moveX = scope.startX = touch.clientX;
                 scope.startY = touch.clientY;
             }
             scope.moveHappen = false;
             scope.startMarginLeft = parseFloat($("#" + scope.id).css("marginLeft"));
         }
         function touchMoveFn(e){
             if (scope.mouseStart) {
                 if (e.clientX) {
                     scope.speed = e.clientX - scope.moveX;
                     scope.moveX = e.clientX;
                     scope.speedY = e.clientY - scope.startY;
                 }else{
                     var touch = e.originalEvent.changedTouches[0];
                     scope.speed = touch.clientX - scope.moveX;
                     scope.moveX = touch.clientX;
                     scope.speedY = touch.clientY - scope.startY;
                 }
                 if (scope.vertical !== 2 && scope.vertical !== 1) {
                     if (Math.abs(scope.speedY) > Math.abs(scope.speed)) {
                         scope.vertical = 1;
                     }else{
                         scope.vertical = 2;
                         scope.moveHappen = true;
                     }
                 }
                 if (scope.vertical === 2) {
                     e.preventDefault();
                     var dx = scope.moveX - scope.startX;
                     var marginLeft = scope.startMarginLeft + dx;
                     if (marginLeft > 50) {
                         marginLeft = 50;
                     }
                     if (marginLeft < -moreLength - 50) {
                         marginLeft = -moreLength - 50;
                     }
                     $("#" + scope.id).css({
                         "margin-left" : marginLeft
                     });
                     scope.time1 = (new Date()).getTime();
                 }
             }
         }
         function touchEndFn(e){
             if (e.clientX) {
                 scope.endX = e.clientX;
             }else{
                 var touch = e.originalEvent.changedTouches[0];
                 scope.endX = touch.clientX;
             }
             scope.time2 = (new Date()).getTime();
             if (scope.time2 - scope.time1 > 20) {
                 scope.speed = 0;
             }
             //console.log(scope.time2 - scope.time1);
             var marginLeft = parseFloat($("#" + scope.id).css("margin-left")) + scope.speed*20;
             if (scope.moveHappen && scope.vertical === 2) {
                 if (marginLeft > 0) {
                     $("#" + scope.id).animate({
                         "margin-left" : 0
                     },200,"linear");
                 }else if (marginLeft < -moreLength) {
                     $("#" + scope.id).animate({
                         "margin-left" : -moreLength
                     },200,"linear");
                 }else{
                     $("#" + scope.id).animate({
                         "margin-left" : marginLeft
                     },200,"linear");
                 }
             }
             scope.vertical = 0;
         }
     };
     new SlideHorizontal("goodsUl");