zepto touch 拖动元素，获取移动坐标

<div id="m" style="position:absolute;width: 100px;height: 100px;background: red"></div>

<script type="text/javascript">



var start_piont,end_point,delta_x,delta_y; 


$(document).ready(function(){
 
	$("#m").on("touchstart",function(e){
	    var touch = e.touches[0];  
	    start_piont = {  
	        x: touch.pageX,  
	        y: touch.pageY  
	    }
	    console.log(start_piont);
	    $("#m").css("top",touch.pageY);
	    $("#m").css("left",touch.pageX);
	}).bind('touchmove',function(e){
	    //在这里不断刷新
	     var touch = e.touches[0];  
	     end_point = {  
	         x: touch.pageX,  
	         y: touch.pageY  
	     }
	    console.log(end_point);
	    $("#m").css("top",touch.pageY);
	    $("#m").css("left",touch.pageX);
	}).bind('touchend', function(e){

	    //在这里取值计算
	    delta_x = end_point.x - start_piont.x;  
	    delta_y = end_point.y - start_piont.y; 

	    console.log(delta_x);
	    console.log(delta_y);
	});	
});

</script>