//根据起始位置坐标判断，下面这个是touch事件的方向判断，你只需要将事件名替换一下就ok了

<script>  
  
          //返回角度  
          function GetSlideAngle(dx, dy) {  
              returnMath.atan2(dy, dx) * 180 / Math.PI;  
          }  
   
          //根据起点和终点返回方向 1：向上，2：向下，3：向左，4：向右,0：未滑动  
          function GetSlideDirection(startX, startY, endX, endY) {  
              var dy = startY - endY;  
              var dx = endX - startX;  
              varresult = 0;  
   
              //如果滑动距离太短  
              if(Math.abs(dx) < 2 && Math.abs(dy) < 2) {  
                  returnresult;  
              }  
   
              varangle = GetSlideAngle(dx, dy);  
              if(angle >= -45 && angle < 45) {  
                  result = 4;  
              }else if (angle >= 45 && angle < 135) {  
                  result = 1;  
              }else if (angle >= -135 && angle < -45) {  
                  result = 2;  
              }  
              else if ((angle >= 135 && angle <= 180) || (angle >= -180 && angle < -135)) {  
                  result = 3;  
              }  
   
              returnresult;  
          }  
   
          //滑动处理  
          var startX, startY;  
          document.addEventListener('touchstart',function (ev) {  
              startX = ev.touches[0].pageX;  
              startY = ev.touches[0].pageY;    
          }, false);  
          document.addEventListener('touchend',function (ev) {  
              var endX, endY;  
              endX = ev.changedTouches[0].pageX;  
              endY = ev.changedTouches[0].pageY;  
              var direction = GetSlideDirection(startX, startY, endX, endY);  
              switch(direction) {  
                  case 0:  
                      alert("没滑动");  
                      break;  
                  case 1:  
                      alert("向上");  
                      break;  
                  case 2:  
                      alert("向下");  
                      break;  
                  case 3:  
                      alert("向左");  
                      alert("!");  
                      break;  
                  case 4:  
                      alert("向右");  
                      break;  
                  default:             
              }  
          }, false);  
     
            
      </script>