一个悬浮的DIV，实现鼠标拖动等功能

<html>
<head>
<title>_xWin</title>
<script language=JScript>
<!--
//可以打包为js文件;
var x0=0,y0=0,x1=0,y1=0;
var offx=6,offy=6;
var moveable=false;
var hover='orange',normal='slategray';//color;
var index=10000;//z-index;
var xx;
//开始拖动;
function startDrag(obj)
{
        if(event.button==1)
        {
                //锁定标题栏;
                obj.setCapture();
                //定义对象;
                var win = obj.parentNode;
                var sha = win.nextSibling;
                //记录鼠标和层位置;
                x0 = event.clientX;
                y0 = event.clientY;
                x1 = parseInt(win.style.left);
                y1 = parseInt(win.style.top);
                //记录颜色;
                normal = obj.style.backgroundColor;
                //改变风格;
                obj.style.backgroundColor = hover;
                win.style.borderColor = hover;
                obj.nextSibling.style.color = hover;
                sha.style.left = x1 + offx;
                sha.style.top  = y1 + offy;
                moveable = true;
        }
}
//拖动;
function drag(obj)
{
        if(moveable)
        {
                var win = obj.parentNode;
                var sha = win.nextSibling;
                win.style.left = x1 + event.clientX - x0;
                                sha.style.left = parseInt(win.style.left) + offx;
                                if ((y1 + event.clientY - y0)>0 && (y1 + event.clientY - y0)<600){
                win.style.top  = y1 + event.clientY - y0;
                sha.style.top  = parseInt(win.style.top) + offy;
                }
        }
}
//停止拖动;
function stopDrag(obj)
{
        if(moveable)
        {
                var win = obj.parentNode;
                var sha = win.nextSibling;
                var msg = obj.nextSibling;
                win.style.borderColor     = normal;
                obj.style.backgroundColor = normal;
                msg.style.color           = normal;
                sha.style.left = obj.parentNode.style.left;
                sha.style.top  = obj.parentNode.style.top;
                obj.releaseCapture();
                moveable = false;
        }
}
//获得焦点;
function getFocus(obj)
{
        if(obj.style.zIndex!=index)
        {
                index = index + 2;
                var idx = index;
                obj.style.zIndex=idx;
                obj.nextSibling.style.zIndex=idx-1;
        }
}
//最小化;
function min(obj)
{
        var win = obj.parentNode.parentNode;
        var sha = win.nextSibling;
        var tit = obj.parentNode;
        var msg = tit.nextSibling;
        var flg = msg.style.display=="none";
        if(flg)
        {
                win.style.height  = parseInt(msg.style.height) + parseInt(tit.style.height) + 2*2;
                sha.style.height  = win.style.height;
                msg.style.display = "block";
                obj.innerHTML = "0";
        }
        else
        {
                win.style.height  = parseInt(tit.style.height) + 2*2;
                sha.style.height  = win.style.height;
                obj.innerHTML = "2";
                msg.style.display = "none";
        }
}
//关闭;
function cls(obj)
{
        var win = obj.parentNode.parentNode.parentNode;
        //var sha = win.nextSibling;
        win.style.visibility = "hidden";
        //sha.style.visibility = "hidden";
}
//显示/隐藏;
function ShowHide()
{
        if (xx!=null)
                        if (xx.style.visibility == "hidden")
                                xx.style.visibility = "visible";
                        else if (xx.style.visibility == "visible")
                                xx.style.visibility = "hidden";
}
//创建一个对象;
function xWin(id,w,h,l,t,tit,msg)
{
        index = index+2;
        this.id      = id;
        this.width   = w;
        this.height  = h;
        this.left    = l;
        this.top     = t;
        this.zIndex  = index;
        this.title   = tit;
        this.message = msg;
        this.obj     = null;
        this.bulid   = bulid;
        this.bulid();
        xx = document.getElementById('allx');
        xx.style.visibility = "visible";

}
//初始化;
function bulid()
{
        var str = ""
                + "<div id='allx'><div id='xMsg'" + this.id + " "
                + "style='"
                + "z-index:" + this.zIndex + ";"
                + "width:" + this.width + ";"
                + "height:" + this.height + ";"
                + "left:" + this.left + ";"
                + "top:" + this.top + ";"
                + "background-color:" + normal + ";"
                + "color:" + normal + ";"
                + "font-size:11px;"
                + "font-family:Verdana;"
                + "position:absolute;"
                + "cursor:default;"
                + "border:2px solid " + normal + ";"
                + "' "
                + "onmousedown='getFocus(this)'>"
                        + "<div "
                        + "style='"
                        + "background-color:" + normal + ";"
                        + "width:" + (this.width) + ";"
                        + "height:20;"
                        + "color:white;"
                        + "' "
                        + "onmousedown='startDrag(this)' "
                        + "onmouseup='stopDrag(this)' "
                        + "onmousemove='drag(this)' "
                        + "ondblclick='min(this.childNodes[1])'"
                        + ">"
                                + "<span style='width:" + (this.width-2*14) + ";padding-left:3px;'>" + this.title + "</span>"
                                + "<span style='width:14;border-width:0px;color:white;font-family:webdings;' onclick='min(this)'>0</span>"
                                + "<span style='width:14;border-width:0px;color:white;font-family:webdings;' onclick='cls(this)'>r</span>"
                        + "</div>"
                                + "<div style='"
                                + "width:100%;"
                                + "height:" + (this.height-20-4) + ";"
                                + "background-color:white;"
                                + "line-height:14px;"
                                + "word-break:break-all;"
                                + "padding:0px;"
                                + "'>" + this.message + "<iframe src='checkBox.html' width=460 scroll='no' style='border-width:0px'></iframe></div>"
                + "</div>"
                + "<div id='xshadow' style='"
                + "width:" + this.width + ";"
                + "height:" + this.height + ";"
                + "top:" + this.top + ";"
                + "left:" + this.left + ";"
                + "z-index:" + (this.zIndex-1) + ";"
                + "position:absolute;"
                + "background-color:black;"
                + "filter:alpha(opacity=40);"
                + "'>by wildwind</div></div>";
        document.getElementById('msgbox').innerHTML = str;
               
               
}
//-->
</script>

<script language='JScript'>
<!--
function initialize()
{
        var a = new xWin("0",460,400,200,200,"效果怎么样！","<br>aaaaaaaaaaaaaaaaaaaaaaaaa");

}
window.onload = initialize;
//-->
</script>
</head>
<body onselectstart='return false' oncontextmenu='return false' scroll='no'>

<DIV class=textSheet
style="BORDER-RIGHT: #3E8529 1px solid; BORDER-TOP: #639517 1px solid; BORDER-LEFT: #3E8529 1px solid; BORDER-BOTTOM: #3E8529 1px solid">

<table width="242" height="160" border="1" ID="Table2">

    <td align="center" valign="middle" style="cursor:hand;font-size:32px;color: #808080"  onMouseMove="bgColor='#ffff99'" onmouseout="bgColor='#FFFFFF'"

onclick="ShowHide()">显示隐藏</td>
</table>
</DIV>
<div id="msgbox"></div>
</body>
</html>