这个弹出层 的功能很好，且容易调用和控制：
<html>
<head>
<title>弹出窗口(可拖动，背景灰色透明)</title>
<script type="text/javascript">
<!--
/*FileName:AlertMsg.js
title:提示标题
content:提示的内容*/
document.write("<style type=\"text/css\">*{padding:0; margin:0}.close{float:right;cursor:default}</style>")
function $(id){ return document.getElementById(id)}
function AlertMsg(title,content){
var msgw,msgh,msgbg,msgcolor,bordercolor,titlecolor,titlebg,con;
con = "<form><table style='margin:10px 15px 15px 15px; border:0;'><tr><th style='border:0; line-height:22px; padding:3px 0; vertical-align:top;font-weight:bold;'>分类：</th><td style='border:0; line-height:22px; padding:3px 0; vertical-align:top;width:75%;'><input type='text' name='typename' size='20'/></td></tr><tr><th></th><td style='border:0; line-height:22px; padding:3px 0; vertical-align:top;width:75%;'><button style='line-height:normal;' type='submit' onclick='return submitform()'>确定</button> <button style='line-height:normal;' type='reset'>取消</button></td></tr></table></form>";
//弹出窗口设置
msgw = 300; //窗口宽度
msgh = 150; //窗口高度
msgbg = "#FFF"; //内容背景
msgcolor = "#000"; //内容颜色
bordercolor = "#000"; //边框颜色
titlecolor = "#FFF"; //标题颜色
titlebg = "#369"; //标题背景
//遮罩背景设置
var sWidth,sHeight;
sWidth = screen.availWidth;
sHeight = document.body.scrollHeight;
//创建遮罩背景
var maskObj = document.createElement("div");
maskObj.setAttribute('id','maskdiv');
maskObj.style.position = "absolute";
maskObj.style.top = "0";
maskObj.style.left = "0";
maskObj.style.background = "#777";
maskObj.style.filter = "Alpha(opacity=30);";
maskObj.style.opacity = "0.3";
maskObj.style.width = sWidth + "px";
maskObj.style.height = sHeight + "px";
maskObj.style.zIndex = "10000";
document.body.appendChild(maskObj);
//创建弹出窗口
var msgObj = document.createElement("div")
msgObj.setAttribute("id","msgdiv");
msgObj.style.position ="absolute";
msgObj.style.top = (screen.availHeight - msgh) / 4 + "px";
msgObj.style.left = (screen.availWidth - msgw) / 2 + "px";
msgObj.style.width = msgw + "px";
msgObj.style.height = msgh + "px";
msgObj.style.fontSize = "12px";
msgObj.style.background = msgbg;
msgObj.style.border = "1px solid " + bordercolor;
msgObj.style.zIndex = "10001";
//创建标题
var thObj = document.createElement("div");
thObj.setAttribute("id","msgth");
thObj.className = "DragAble";
thObj.style.cursor = "move";
thObj.style.padding = "4px 6px";
thObj.style.color = titlecolor;
thObj.style.background = titlebg;
var titleStr = "<a class='close' title='关闭' style='cursor:pointer' onclick='CloseMsg()'>关闭</a>"+"<span>"+ title +"</span>";
thObj.innerHTML = titleStr;
//创建内容
var bodyObj = document.createElement("div");
bodyObj.setAttribute("id","msgbody");
bodyObj.style.padding = "10px";
bodyObj.style.lineHeight = "1.5em";
bodyObj.innerHTML = con;
var txt = document.createTextNode(content)
bodyObj.appendChild(txt);
//生成窗口
document.body.appendChild(msgObj);
$("msgdiv").appendChild(thObj);
$("msgdiv").appendChild(bodyObj);
}
function CloseMsg(){
//移除对象
document.body.removeChild($("maskdiv"));
$("msgdiv").removeChild($("msgth"));
$("msgdiv").removeChild($("msgbody"));
document.body.removeChild($("msgdiv"));
}
//拖动窗口
var ie = document.all;
var nn6 = document.getElementById&&!document.all;
var isdrag = false;
var y,x;
var oDragObj;
function moveMouse(e) {
if (isdrag) {
oDragObj.style.top = (nn6 ? nTY + e.clientY - y : nTY + event.clientY - y)+"px";
oDragObj.style.left = (nn6 ? nTX + e.clientX - x : nTX + event.clientX - x)+"px";
return false;
}
}
function initDrag(e) {
var oDragHandle = nn6 ? e.target : event.srcElement;
var topElement = "HTML";
while (oDragHandle.tagName != topElement && oDragHandle.className != "DragAble") {
oDragHandle = nn6 ? oDragHandle.parentNode : oDragHandle.parentElement;
}
if (oDragHandle.className=="DragAble") {
isdrag = true;
oDragObj = oDragHandle.parentNode;
nTY = parseInt(oDragObj.style.top);
y = nn6 ? e.clientY : event.clientY;
nTX = parseInt(oDragObj.style.left);
x = nn6 ? e.clientX : event.clientX;
document.onmousemove = moveMouse;
return false;
}
}
document.onmousedown = initDrag;
document.onmouseup = new Function("isdrag=false");
//-->
</script>
</head>
<body>
<table width="600" border="0" cellspacing="0" cellpadding="0">
<tr >
<td height="100" align="center" >
<p><a href="javascript:AlertMsg("温馨提示",'')">点我试试!</a></p>
</td>
</tr>
</table>
</div>
</body>
</html>
<html>
<head>
<title>弹出窗口(可拖动，背景灰色透明)</title>
<script type="text/javascript">
<!--
/*FileName:AlertMsg.js
title:提示标题
content:提示的内容*/
document.write("<style type=\"text/css\">*{padding:0; margin:0}.close{float:right;cursor:default}</style>")
function $(id){ return document.getElementById(id)}
function AlertMsg(title,content){
var msgw,msgh,msgbg,msgcolor,bordercolor,titlecolor,titlebg,con;
con = "<form><table style='margin:10px 15px 15px 15px; border:0;'><tr><th style='border:0; line-height:22px; padding:3px 0; vertical-align:top;font-weight:bold;'>分类：</th><td style='border:0; line-height:22px; padding:3px 0; vertical-align:top;width:75%;'><input type='text' name='typename' size='20'/></td></tr><tr><th></th><td style='border:0; line-height:22px; padding:3px 0; vertical-align:top;width:75%;'><button style='line-height:normal;' type='submit' onclick='return submitform()'>确定</button> <button style='line-height:normal;' type='reset'>取消</button></td></tr></table></form>";
//弹出窗口设置
msgw = 300; //窗口宽度
msgh = 150; //窗口高度
msgbg = "#FFF"; //内容背景
msgcolor = "#000"; //内容颜色
bordercolor = "#000"; //边框颜色
titlecolor = "#FFF"; //标题颜色
titlebg = "#369"; //标题背景
//遮罩背景设置
var sWidth,sHeight;
sWidth = screen.availWidth;
sHeight = document.body.scrollHeight;
//创建遮罩背景
var maskObj = document.createElement("div");
maskObj.setAttribute('id','maskdiv');
maskObj.style.position = "absolute";
maskObj.style.top = "0";
maskObj.style.left = "0";
maskObj.style.background = "#777";
maskObj.style.filter = "Alpha(opacity=30);";
maskObj.style.opacity = "0.3";
maskObj.style.width = sWidth + "px";
maskObj.style.height = sHeight + "px";
maskObj.style.zIndex = "10000";
document.body.appendChild(maskObj);
//创建弹出窗口
var msgObj = document.createElement("div")
msgObj.setAttribute("id","msgdiv");
msgObj.style.position ="absolute";
msgObj.style.top = (screen.availHeight - msgh) / 4 + "px";
msgObj.style.left = (screen.availWidth - msgw) / 2 + "px";
msgObj.style.width = msgw + "px";
msgObj.style.height = msgh + "px";
msgObj.style.fontSize = "12px";
msgObj.style.background = msgbg;
msgObj.style.border = "1px solid " + bordercolor;
msgObj.style.zIndex = "10001";
//创建标题
var thObj = document.createElement("div");
thObj.setAttribute("id","msgth");
thObj.className = "DragAble";
thObj.style.cursor = "move";
thObj.style.padding = "4px 6px";
thObj.style.color = titlecolor;
thObj.style.background = titlebg;
var titleStr = "<a class='close' title='关闭' style='cursor:pointer' onclick='CloseMsg()'>关闭</a>"+"<span>"+ title +"</span>";
thObj.innerHTML = titleStr;
//创建内容
var bodyObj = document.createElement("div");
bodyObj.setAttribute("id","msgbody");
bodyObj.style.padding = "10px";
bodyObj.style.lineHeight = "1.5em";
bodyObj.innerHTML = con;
var txt = document.createTextNode(content)
bodyObj.appendChild(txt);
//生成窗口
document.body.appendChild(msgObj);
$("msgdiv").appendChild(thObj);
$("msgdiv").appendChild(bodyObj);
}
function CloseMsg(){
//移除对象
document.body.removeChild($("maskdiv"));
$("msgdiv").removeChild($("msgth"));
$("msgdiv").removeChild($("msgbody"));
document.body.removeChild($("msgdiv"));
}
//拖动窗口
var ie = document.all;
var nn6 = document.getElementById&&!document.all;
var isdrag = false;
var y,x;
var oDragObj;
function moveMouse(e) {
if (isdrag) {
oDragObj.style.top = (nn6 ? nTY + e.clientY - y : nTY + event.clientY - y)+"px";
oDragObj.style.left = (nn6 ? nTX + e.clientX - x : nTX + event.clientX - x)+"px";
return false;
}
}
function initDrag(e) {
var oDragHandle = nn6 ? e.target : event.srcElement;
var topElement = "HTML";
while (oDragHandle.tagName != topElement && oDragHandle.className != "DragAble") {
oDragHandle = nn6 ? oDragHandle.parentNode : oDragHandle.parentElement;
}
if (oDragHandle.className=="DragAble") {
isdrag = true;
oDragObj = oDragHandle.parentNode;
nTY = parseInt(oDragObj.style.top);
y = nn6 ? e.clientY : event.clientY;
nTX = parseInt(oDragObj.style.left);
x = nn6 ? e.clientX : event.clientX;
document.onmousemove = moveMouse;
return false;
}
}
document.onmousedown = initDrag;
document.onmouseup = new Function("isdrag=false");
//-->
</script>
</head>
<body>
<table width="600" border="0" cellspacing="0" cellpadding="0">
<tr >
<td height="100" align="center" >
<p><a href="javascript:AlertMsg("温馨提示",'')">点我试试!</a></p>
</td>
</tr>
</table>
</div>
</body>
</html>
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