完美拖拽，JS拖动层代码，可回放拖动规迹

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引入JS
- 3.0.0 2.2.0 2.1.4 2.1.3 2.1.2 2.1.1 2.1.0 2.0.3 2.0.2 2.0.1 2.0.0 1.12.0 1.11.3 1.11.2 1.11.1 1.11.0 1.10.2 1.10.1 1.10.0 1.9.1 1.9.0 1.8.3 1.8.2 1.8.1 1.8.0 1.7.2 1.7.1 1.7 1.6.4 1.6.2 1.6.1 1.4.4 1.4.3 1.4.2 1.4.1 1.4.0
- 1.7.3 1.7.2 1.7.1.0 1.7.0.0
- 2.0.0-beta.0 2.0.0-alpha.55 1.5.0-rc.0 1.4.8 1.4.0 1.3.20 1.2.29 1.1.5 1.0.8
- 1.8.3 1.7.0 1.6.0 1.5.2 1.4.4 1.3.3 1.2.4 1.1.7
- 1.10.4 1.9.7 1.8.10 1.7.8 1.6.3 1.5.4 1.4.6 1.3.3
- core1.6.0 core-compat1.6.0 core1.5.2 core-compat1.5.2 core-full-compat-yc1.4.5 core-full-compat1.4.5 core-full-nocompat-yc1.4.5 core-full-nocompat1.4.5
- 1.4.2 1.4.1 1.4.0 1.3.0 1.2.0 1.1.0
- 3.7.3 3.7.2 3.7.1 3.7.0 3.7 3.6.2 3.6.1 3.6

引入框架
- 1.4.5 1.4.4 1.4.3 1.4.2 1.4.1 1.4.0 1.3.2
- 1.11.4 1.11.3 1.11.2 1.11.1 1.11.0 1.10.4 1.10.3 1.10.2
- 3.3.6 3.3.5 3.3.0 3.2.0 2.3.2

汉王

HTML代码

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>完美拖拽</title>
<style type="text/css">
html,body{overflow:hidden;}
body,div,h2,p{margin:0;padding:0;}
body{color:#fff;background:#000;font:12px/2 Arial;}
p{padding:0 10px;margin-top:10px;}
span{color:#ff0;padding-left:5px;}
#box{position:absolute;width:300px;height:150px;background:#333;border:2px solid #ccc;top:50%;left:50%;margin:-75px 0 0 -150px;}
#box h2{height:25px;cursor:move;background:#222;border-bottom:2px solid #ccc;text-align:right;padding:0 10px;}
#box h2 a{color:#fff;font:12px/25px Arial;text-decoration:none;outline:none;}
</style>
<script type="text/javascript">
window.onload=function ()
{
	var oBox=document.getElementById("box");
	var oH2 = oBox.getElementsByTagName("h2")[0];
	var oA = oBox.getElementsByTagName("a")[0];
	var aSpan = oBox.getElementsByTagName("span");	
	var disX = disY = 0;
	var bDrag = false;
	var aPos = [{x:oBox.offsetLeft, y:oBox.offsetTop}]
	//鼠标按下, 激活拖拽
	oH2.onmousedown = function (event)
	{		
		var event = event || window.event;
		bDrag = true;
		disX = event.clientX - oBox.offsetLeft;
		disY = event.clientY - oBox.offsetTop;
		aPos.push({x:oBox.offsetLeft, y:oBox.offsetTop})
		this.setCapture && this.setCapture();
		return false
	};
	
	//拖拽开始
	document.onmousemove = function (event)
	{
		if (!bDrag) return;
		var event = event || window.event;
		var iL = event.clientX - disX;
		var iT = event.clientY - disY;
		var maxL = document.documentElement.clientWidth - oBox.offsetWidth;
		var maxT = document.documentElement.clientHeight - oBox.offsetHeight;
		iL = iL < 0 ? 0 : iL;
		iL = iL > maxL ? maxL : iL; 
		
		iT = iT < 0 ? 0 : iT;
		iT = iT > maxT ? maxT : iT;
		oBox.style.marginTop = oBox.style.marginLeft = 0;
		oBox.style.left = iL + "px";
		oBox.style.top = iT + "px";		
		aPos.push({x:iL, y:iT})
		status();
		return false
	};

//鼠标释放, 结束拖拽
	document.onmouseup = window.onblur = oH2.onlosecapture = function ()
	{
		bDrag = false;				
		oH2.releaseCapture && oH2.releaseCapture();
		status()
	};
	
	//回放拖动轨迹
	oA.onclick = function ()
	{
		if (aPos.length == 1) return;
		var timer = setInterval(function ()
		{
			var oPos = aPos.pop();
			oPos ? (oBox.style.left = oPos.x + "px", oBox.style.top = oPos.y + "px", status()) : clearInterval(timer)
		}, 30);
		
		this.focus = false;//去除链接虚线
		
		return false
	};
	
	//阻止冒泡
	oA.onmousedown = function (event)
	{
		(event || window.event).cancelBubble = true
	};
	
	//监听状态函数
	function status ()
	{
		aSpan[0].innerHTML = bDrag;
		aSpan[1].innerHTML = oBox.offsetTop;
		aSpan[2].innerHTML = oBox.offsetLeft
	}
	
	//初始调用
	status()
};
</script>
</head>
<body>
<div id="box">
    <h2><a href="javascript:;">点击回放拖动轨迹</a></h2>
    <p><strong>Drag:</strong><span></span></p>
    <p><strong>offsetTop:</strong><span></span></p>
    <p><strong>offsetLeft:</strong><span></span></p>
</div>
</body>
</html>

CSS代码

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JS代码

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简介

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名称

完美拖拽，JS拖动层代码，可回放拖动规迹

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描述

一个完美的JS拖拽功能，实现层在网页上任意拖动，还可回放拖动规迹，而且兼容性也是相当不错的代码，学习JavaScript的朋友，您可不要错过哦。