js 提示框

以下是js代码

// JavaScript Document
/*  
**    ==================================================================================================  
**    类名：CLASS_MSN_MESSAGE  
**    功能：提供类似MSN消息框  
**    示例：  
    ---------------------------------------------------------------------------------------------------  
  
            var MSG = new CLASS_MSN_MESSAGE("aa",200,120,"短消息提示：","您有1封消息","今天请我吃饭哈");  
                MSG.show();  
  
    ---------------------------------------------------------------------------------------------------  
**    作者：ttyp  
**    邮件：[e-mail]  
**    日期：2005-3-18  
**    ==================================================================================================  
**/  
  
  
/*  
 *    消息构造  
 */  
function CLASS_MSN_MESSAGE(id,width,height,caption,title,message,target,action)  
{  
    this.id     = id;  
    this.title  = title;  
    this.caption= caption;  
    this.message= message;  
    this.target = target;  
    this.action = action;  
    this.width    = width?width:200;  
    this.height = height?height:120;  
    this.timeout= 150;  
    this.speed    = 20; 
    this.step    = 1; 
    this.right    = screen.width -1;  
    this.bottom = screen.height; 
    this.left    = this.right - this.width; 
    this.top    = this.bottom - this.height; 
    this.timer    = 0; 
}  
  
/*  
 *    隐藏消息方法  
 */  
CLASS_MSN_MESSAGE.prototype.hide = function()  
{  
    if(this.onunload())      
    {  
        var offset  = this.height>this.bottom-this.top?this.height:this.bottom-this.top; 
        var me  = this;  
 
        if(this.timer>0)  
        {   
            window.clearInterval(me.timer);  
        }  
 
        var fun = function()  
        {  
            var x  = me.left; 
            var y  = 0; 
            var width = me.width; 
            var height = 0; 
            if(me.offset>0) 
            { 
                height = me.offset; 
            } 
 
            y  = me.bottom - height; 
 
            if(y>=me.bottom) 
            { 
                window.clearInterval(me.timer);  
                me.Pop.hide();  
            } 
            else 
            { 
                me.offset = me.offset - me.step;  
            } 
            me.Pop.show(x,y,width,height);    
 
             
 
        }  
 
        this.timer = window.setInterval(fun,this.speed)      
    }  
}  
  
/*  
 *    消息卸载事件，可以重写  
 */  
CLASS_MSN_MESSAGE.prototype.onunload = function()  
{  
    return true;  
}  
/*  
 *    消息命令事件，要实现自己的连接，请重写它  
 *  
 */  
CLASS_MSN_MESSAGE.prototype.oncommand = function()  
{  
    window.open(this.action,this.target,'');
    this.hide();  
}  
  
/*  
 *    消息显示方法  
 */  
CLASS_MSN_MESSAGE.prototype.show = function()  
{  
    var oPopup = window.createPopup(); //IE5.5+  
  
    this.Pop = oPopup;  
  
    var w = this.width;  
    var h = this.height;  
  
    var str = "<DIV style='BORDER-RIGHT: #455690 1px solid; BORDER-TOP: #a6b4cf 1px solid; Z-INDEX: 99999; LEFT: 0px; BORDER-LEFT: #a6b4cf 1px solid; WIDTH: " + w + "px; BORDER-BOTTOM: #455690 1px solid; POSITION: absolute; TOP: 0px; HEIGHT: " + h + "px; BACKGROUND-COLOR: #c9d3f3'>"  
        str += "<TABLE style='BORDER-TOP: #ffffff 1px solid; BORDER-LEFT: #ffffff 1px solid' cellSpacing=0 cellPadding=0 width='100%' bgColor=#cfdef4 border=0>"  
        str += "<TR>"  
        str += "<TD style='FONT-SIZE: 12px;COLOR: #0f2c8c' width=30 height=24></TD>"  
        str += "<TD style='PADDING-LEFT: 4px; FONT-WEIGHT: normal; FONT-SIZE: 12px; COLOR: #1f336b; PADDING-TOP: 4px' vAlign=center width='100%'>" + this.caption + "</TD>"  
        str += "<TD style='PADDING-RIGHT: 2px; PADDING-TOP: 2px' vAlign=center align=right width=19>"  
        str += "<SPAN title=关闭 style='FONT-WEIGHT: bold; FONT-SIZE: 12px; CURSOR: hand; COLOR: red; MARGIN-RIGHT: 4px' id='btSysClose' >×</SPAN></TD>"  
        str += "</TR>"  
        str += "<TR>"  
        str += "<TD style='PADDING-RIGHT: 1px;PADDING-BOTTOM: 1px' colSpan=3 height=" + (h-28) + ">"  
        str += "<DIV style='BORDER-RIGHT: #b9c9ef 1px solid; PADDING-RIGHT: 8px; BORDER-TOP: #728eb8 1px solid; PADDING-LEFT: 8px; FONT-SIZE: 12px; PADDING-BOTTOM: 8px; BORDER-LEFT: #728eb8 1px solid; WIDTH: 100%; COLOR: #1f336b; PADDING-TOP: 8px; BORDER-BOTTOM: #b9c9ef 1px solid; HEIGHT: 100%'>" + this.title + "<BR><BR>"  
        str += "<DIV style='WORD-BREAK: break-all' align=left><A href='javascript:void(0)' hidefocus=true id='btCommand'><FONT color=#ff0000>" + this.message + "</FONT></A></DIV>"  
        str += "</DIV>"  
        str += "</TD>"  
        str += "</TR>"  
        str += "</TABLE>"  
        str += "</DIV>"  
  
    oPopup.document.body.innerHTML = str;  
  
    this.offset  = 0; 
    var me  = this;  
    var fun = function()  
    {  
        var x  = me.left; 
        var y  = 0; 
        var width    = me.width; 
        var height    = me.height; 
 
 
            if(me.offset>me.height) 
            { 
                height = me.height; 
            } 
            else 
            { 
                height = me.offset; 
            } 
 
        y  = me.bottom - me.offset; 
        if(y<=me.top) 
        { 
            me.timeout--; 
            if(me.timeout==0) 
            { 
                window.clearInterval(me.timer);  
                //me.hide(); 
            } 
        } 
        else 
        { 
            me.offset = me.offset + me.step; 
        } 
        me.Pop.show(x,y,width,height);    
 
          
 
    }  
  
    this.timer = window.setInterval(fun,this.speed)      
  
     
  
    var btClose = oPopup.document.getElementById("btSysClose");  
  
    btClose.onclick = function()  
    {  
        me.hide();  
    }  
  
    var btCommand = oPopup.document.getElementById("btCommand");  
    btCommand.onclick = function()  
    {  
        me.oncommand();  
    }  
  
  
}  
/* 
** 设置速度方法 
**/ 
CLASS_MSN_MESSAGE.prototype.speed = function(s) 
{ 
    var t = 20; 
    try 
    { 
        t = praseInt(s); 
    } 
    catch(e){} 
    this.speed = t; 
} 
/* 
** 设置步长方法 
**/ 
CLASS_MSN_MESSAGE.prototype.step = function(s) 
{ 
    var t = 1; 
    try 
    { 
        t = praseInt(s); 
    } 
    catch(e){} 
    this.step = t; 
} 
  
CLASS_MSN_MESSAGE.prototype.rect = function(left,right,top,bottom) 
{ 
    try 
    { 
        this.left        = left    !=null?left:this.right-this.width; 
        this.right        = right    !=null?right:this.left +this.width; 
        this.bottom        = bottom!=null?(bottom>screen.height?screen.height:bottom):screen.height; 
        this.top        = top    !=null?top:this.bottom - this.height; 
 
    } 
    catch(e) 
    {} 
} 

以下是html代码

<html>
<head>
<script src="message.js"></script>
<script>
	function fun()
	{
	    //构造对象(id号,宽，高,'标题1','标题2','内容','超链接','打开位置');
		var MSG1 = new CLASS_MSN_MESSAGE("aa",200,120,"短消息提示：","您有1封消息","今天请我吃饭哈");  
		MSG1.rect(null,null,null,screen.height-60);  //设置左，右，上，下距离
		MSG1.speed    = 10; //设置速度方法
		MSG1.step    = 5;   //设置步长方法 
		MSG1.show();  //显示方法
	}
</script>
</head>

<body  onLoad="fun()" >
</body>
</html>