function findCoordinates(e) {
		// 如果需要用 pageX/Y 代替 clinetX/Y
		var x,y;
		if(e.changedTouches){
			x = e.changedTouches[0].clientX;
			y = e.changedTouches[0].clientY;
		}else{
			x = e.clientX;
			y = e.clientY;
		}
		console.log(e);
		$('#test').text("x:"+x+",y:"+y);
		return [x,y];
	}
 
    var el = document.getElementsByClassName('content')[0];
    console.log(el);
 
    el.addEventListener('touchstart', findCoordinates, false);