function wetherScroll(){
 var startX = startY = endX =endY =0;
 var body=document.getElementsByTagName("body");
 body.bind('touchstart',function(event){
 var touch = event.targetTouches[0];
 //滑動(dòng)起點(diǎn)的坐標(biāo)
 startX = touch.pageX;
 startY = touch.pageY;
 // console.log("startX:"+startX+","+"startY:"+startY);
 });
 body.bind("touchmove",function(event){
 var touch = event.targetTouches[0];
 //手勢(shì)滑動(dòng)時(shí)，手勢(shì)坐標(biāo)不斷變化，取最后一點(diǎn)的坐標(biāo)為最終的終點(diǎn)坐標(biāo)
 endX = touch.pageX;
 endY = touch.pageY;
 // console.log("endX:"+endX+","+"endY:"+endY);
 })
 body.bind("touchend",function(event){
 var distanceX=endX-startX,
 distanceY=endY - startY;
 // console.log("distanceX:"+distanceX+","+"distanceY:"+distanceY);
 //移動(dòng)端設(shè)備的屏幕寬度
 var clientHeight; =document.documentElement.clientHeight;
 // console.log(clientHeight;*0.2);
 //判斷是否滑動(dòng)了，而不是屏幕上單擊了
 if(startY!=Math.abs(distanceY)){
 //在滑動(dòng)的距離超過屏幕高度的20%時(shí)，做某種操作
 if(Math.abs(distanceY)>clientHeight*0.2){
 //向下滑實(shí)行函數(shù)someAction1，向上滑實(shí)行函數(shù)someAction2
 distanceY <0 ? someAction1():someAction2();
 }
 }
 startX = startY = endX =endY =0;
 })
}