<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
</head>
<body>
<div class="bbs_sign" id="bbsSi" draggable="true"><img src="img/bi.png">我要发帖</div>
<script type="text/javascript">
var bbsSi=document.getElementById("bbsSi");
//监听
bbsSi.addEventListener('touchmove',function(event){
//阻止默认
event.preventDefault();
//判断是否是一个手指
if(event.targetTouches.length==1)
{
//拖拽最后的位置
var touch = event.targetTouches[0];
bbsSi.style.right = 0;
bbsSi.style.top = touch.pageY + 'px'; }
},false);
</script>
</body>
</html>
