可搬动弹出层 _Web前端

可移动弹出层
<!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>可拖动全屏弹出层</title>
		<script language="javascript">

function alertWin(title, msg, w, h) {
	var titleheight = "22px"; // 提示窗口标题高度
	var bordercolor = "#666699"; // 提示窗口的边框颜色
	var titlecolor = "#FFFFFF"; // 提示窗口的标题颜色
	var titlebgcolor = "#666699"; // 提示窗口的标题背景色
	var bgcolor = "#FFFFFF"; // 提示内容的背景色
	var iWidth = document.body.clientWidth;
	var iHeight = document.body.clientHeight;
 
    //弹出层的后背景
	var bgObj = document.createElement("div");
	bgObj.id = "bgObjId";
	bgObj.style.cssText = "position:absolute;left:0px;top:0px;width:" + iWidth + "px;height:" + Math.max(document.body.clientHeight, iHeight) + "px;filter:Alpha(Opacity=30);opacity:0.3;background-color:#000000;z-index:101;";
	document.body.appendChild(bgObj);
 
    //弹出层
	var msgObj = document.createElement("div");
	msgObj.id = "msgObjId";
	msgObj.style.cssText = "position:absolute;font:11px '\u5b8b\u4f53';top:" + (iHeight - h) / 2 + "px;left:" + (iWidth - w) / 2 + "px;width:" + w + "px;height:" + h + "px;text-align:center;border:1px solid " + bordercolor + ";background-color:" + bgcolor + ";padding:1px;line-height:22px;z-index:102;";
	document.body.appendChild(msgObj);


    //弹出层里面的表格 msgObj.appendChild(table);
	var table = document.createElement("table");
	msgObj.appendChild(table);
	table.style.cssText = "margin:0px;border:0px;padding:0px;";
	table.cellSpacing = 0;
	var tr = table.insertRow(-1);
	var titleBar = tr.insertCell(-1);
	titleBar.style.cssText = "width:100%;height:" + titleheight + "px;text-align:left;padding:3px;margin:0px;font:bold 13px '\u5b8b\u4f53';color:" + titlecolor + ";border:1px solid " + bordercolor + ";cursor:move;background-color:" + titlebgcolor;
	titleBar.style.paddingLeft = "10px";
	titleBar.innerHTML = title;
 
    //关闭
	var closeBtn = tr.insertCell(-1);
	closeBtn.style.cssText = "cursor:pointer; padding:2px;background-color:" + titlebgcolor;
	closeBtn.innerHTML = "<span style='font-size:15pt; color:" + titlecolor + ";'>\xd7</span>";
	closeBtn.onclick = function () {
		document.body.removeChild(bgObj);
		document.body.removeChild(msgObj);
	};
 
    //主题内容
	var msgBox = table.insertRow(-1).insertCell(-1);
	msgBox.style.cssText = "font:10pt '\u5b8b\u4f53';";
	msgBox.colSpan = 2;
	msgBox.innerHTML = msg;

 
    //以下部分弹出层可以移动
	var moveX = 0;
	var moveY = 0;
	var moveTop = 0;
	var moveLeft = 0;
	var moveable = false;
	var docMouseMoveEvent = document.onmousemove;
	var docMouseUpEvent = document.onmouseup;
	titleBar.onmousedown = function () {
		var evt = getEvent();
		moveable = true;
		moveX = evt.clientX;
		moveY = evt.clientY;
		moveTop = parseInt(msgObj.style.top);
		moveLeft = parseInt(msgObj.style.left);
		document.onmousemove = function () {
			if (moveable) {
				var evt = getEvent();
				var x = moveLeft + evt.clientX - moveX;
				var y = moveTop + evt.clientY - moveY;
				if (x > 0 && (x + w < iWidth) && y > 0 && (y + h < iHeight)) {
					msgObj.style.left = x + "px";
					msgObj.style.top = y + "px";
				}
			}
		};
		document.onmouseup = function () {
			if (moveable) {
				document.onmousemove = docMouseMoveEvent;
				document.onmouseup = docMouseUpEvent;
				moveable = false;
				moveX = 0;
				moveY = 0;
				moveTop = 0;
				moveLeft = 0;
			}
		};
	};
	function getEvent() {
		return window.event || arguments.callee.caller.arguments[0];
	}
}


</script>
	</head>
	<body>
		<input type="button" value="点这里"
			onclick="alertWin('标题','这里是内容',300,200);" />
	</body>
</html>