今天终于学会了下拉刷新，上拉刷新

<div id="megBox">

<div id="refreshbar" style="height:0">下拉刷新。。</div>

</div>

var touchPoint={

Y:0,

Loading:false

}

function InitTouch(){

var box=document.getElementById("megBox");

box.addEventListener("touchstart",function(target){

touchPoint.Y=target.targetTouches[0].pageY;

},false);

box.addEventListener("touchmove",function(target){

if(!touchPoint.Loading){

var distance=target.targetTouched[0].pageY-touchPoint.Y;

if(distance>100){

touchPoint.Loading=true;

$("#refreshbar").height(30);

setTimeout(function(){

//刷新方法

},2000);

}

}

},false);

}