Javascript 拖动效果兼容火狐

作者：袖梨 2022-06-25

提示：您可以先修改部分代码再运行

<!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=gb2312" />
<title>拖动效果兼容火狐</title>
<style type="text/<a href="http://www.111com.net/cssdiv/css.html" target="_blank">css</a>">

</style>
<script type="text/javascript">
/*
十三妖
qq:181907667
msn:wl181907667@hotmail.com
邮箱:thirdteendevil@163.com
*/
function dragClass(){
	this.mouseState = document.all ? 1 : 0 ;
	this.x;
	this.y;
	this.dragId = null;
	this.index = 100;
	document.onselectstart = function(){return false;};
}
dragClass.prototype = {
	dragStar:function(dragId,moveId){//拖动入口函数
		var _this = this;	
		_this.$(dragId).style.cursor = "move";	
		_this.$(dragId).onmousedown = function(e){
			var e = e ? e : event;
			//_this.$(moveId).style.zIndex = _this.index++;
			if(e.button == _this.mouseState)
			{
				_this.setDragInfo(e,moveId,moveId);
				_this.dragPro(moveId);
			}			
		},
		_this.$(moveId).onmousedown = function(e){
			_this.$(moveId).style.zIndex = _this.index++;
		},		
		_this.$(dragId).onmouseup = function(){
			_this.clearDragId();
		}
		document.onmouseup = function(){
			_this.clearDragId();
		}
	},
	setDragInfo:function(e,dragId,moveId){//拖动初始化
		this.x = e.clientX;
		this.y = e.clientY;
		this.dragId = dragId;
		if(this.$(moveId).style.position != "absolute")
		{
			this.$(moveId).style.px";	
			this.$(moveId).style.px";
			this.$(moveId).style.position = "absolute";
			this.$(moveId).style.left = this.$(moveId).offsetLeft + "px";
			this.$(moveId).style.top = this.$(moveId).offsetTop + "px";
		}				
	},
	clearDragId:function(){ //清除拖动ID
		this.dragId = null;
	},
	dragPro:function(moveId){
		var _this = this;
		document.onmousemove = function(e){
			var e = e ? e : event;
			if(e.button == _this.mouseState && _this.dragId != null)
			{
				var x = e.clientX;
				var y = e.clientY;
				//_this.$(moveId).style.left = (_this.$(moveId).offsetLeft + (x - _this.x)) + "px";
				//_this.$(moveId).style.top = (_this.$(moveId).offsetTop + (y - _this.y)) + "px";
				_this.$(moveId).style.left = (parseInt(_this.$(moveId).style.left) + (x - _this.x)) + "px";
				_this.$(moveId).style.top = (parseInt(_this.$(moveId).style.top) + (y - _this.y)) + "px";
				_this.x = x;
				_this.y = y;
				//alert(_this.$(dragId).style.left);
			}
			
		}
	},
	$:function(o){//获取对象
		if(typeof(o) == "string")
		{
			if(document.getElementById(o))
			{
				return document.getElementById(o);
			}
			else
			{
				alert("errId ""+ o + ""!");
				return false;
			}
		}
		else
		{
			return o;
		}
	}
}
window.onload = function(){
	var c = new dragClass();
	c.dragStar("b","a");
	c.dragStar("d","c");
}
</script>
</head>
<body>
<div class="bodyer">
	<h1 class="t_rt">
		鼠标拖动层封装类
	</h1>
	
	<h2>
		效果预览
	</h2>
	
	<div class="preview">
		<div class="scrolldoorFrame">
			<div id="a" style="background:#FFF;border:1px solid #DDD;">
				<div id="b" style="margin:1px;line-overflow:hidden;background:#999;font-size:12px;font-weight:bold;color:#FFF;padding-left:15px;">
				拖动层1
				</div>
				    移动层
			</div>
			
			<div id="c" style="background:#FFF;border:1px solid #DDD;">
				<div id="d" style="margin:1px;line-overflow:hidden;background:#999;font-size:12px;font-weight:bold;color:#FFF;padding-left:15px;">
				拖动层2
				</div>
				    移动层
			</div>
		</div>
	</div>
	
	<h2>
		源代码
	</h2>
	
	<div class="textDiv">
		<textarea id="sourse">
function dragClass(){
	this.mouseState = document.all ? 1 : 0 ;
	this.x;
	this.y;
	this.dragId = null;
	this.index = 100;
	document.onselectstart = function(){return false;};
}
dragClass.prototype = {
	dragStar:function(dragId,moveId){//拖动入口函数
		var _this = this;	
		_this.$(dragId).style.cursor = "move";	
		_this.$(dragId).onmousedown = function(e){
			var e = e ? e : event;
			//_this.$(moveId).style.zIndex = _this.index++;
			if(e.button == _this.mouseState)
			{
				_this.setDragInfo(e,moveId,moveId);
				_this.dragPro(moveId);
			}			
		},
		_this.$(moveId).onmousedown = function(e){
			_this.$(moveId).style.zIndex = _this.index++;
		},		
		_this.$(dragId).onmouseup = function(){
			_this.clearDragId();
		}
		document.onmouseup = function(){
			_this.clearDragId();
		}
	},
	setDragInfo:function(e,dragId,moveId){//拖动初始化
		this.x = e.clientX;
		this.y = e.clientY;
		this.dragId = dragId;
		if(this.$(moveId).style.position != "absolute")
		{
			this.$(moveId).style.px";	
			this.$(moveId).style.px";
			this.$(moveId).style.position = "absolute";
			this.$(moveId).style.left = this.$(moveId).offsetLeft + "px";
			this.$(moveId).style.top = this.$(moveId).offsetTop + "px";
		}				
	},
	clearDragId:function(){ //清除拖动ID
		this.dragId = null;
	},
	dragPro:function(moveId){
		var _this = this;
		document.onmousemove = function(e){
			var e = e ? e : event;
			if(e.button == _this.mouseState && _this.dragId != null)
			{
				var x = e.clientX;
				var y = e.clientY;
				//_this.$(moveId).style.left = (_this.$(moveId).offsetLeft + (x - _this.x)) + "px";
				//_this.$(moveId).style.top = (_this.$(moveId).offsetTop + (y - _this.y)) + "px";
				_this.$(moveId).style.left = (parseInt(_this.$(moveId).style.left) + (x - _this.x)) + "px";
				_this.$(moveId).style.top = (parseInt(_this.$(moveId).style.top) + (y - _this.y)) + "px";
				_this.x = x;
				_this.y = y;
				//alert(_this.$(dragId).style.left);
			}
			
		}
	},
	$:function(o){//获取对象
		if(typeof(o) == "string")
		{
			if(document.getElementById(o))
			{
				return document.getElementById(o);
			}
			else
			{
				alert("errId ""+ o + ""!");
				return false;
			}
		}
		else
		{
			return o;
		}
	}
}