右下角弹出类似QQ或MSN消息提示

<SCRIPT language=JavaScript>
<!--

/**//*
*    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;
    this.pause    = false;
    this.close    = false;
    this.autoHide    = true;
}

/**//*
*    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);
        }

        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(){
    //this.close = true;
    this.hide();
window.open("http://www.makewing.com");

}
/**//*
*    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=false id='btCommand'><FONT color=#ff0000>" + this.message + "</FONT></A> - <A href='http://www.makewing.com' hidefocus=false id='ommand'><FONT color=#ff0000>网页素材下载站</FONT></A></DIV>"
        str += "</DIV>"
        str += "</TD>"
        str += "</TR>"
        str += "</TABLE>"
        str += "</DIV>"

    oPopup.document.body.innerHTML = str;


    this.offset = 0;
    var me = this;

oPopup.document.body.onmouseover = function(){me.pause=true;}
oPopup.document.body.onmouseout = function(){me.pause=false;}

    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);
                if(me.autoHide){
                    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.close = true;
        me.hide();
    }

    var btCommand = oPopup.document.getElementById("btCommand");
    btCommand.onclick = function(){
        me.oncommand();
    }
var ommand = oPopup.document.getElementById("ommand");
      ommand.onclick = function(){
       //this.close = true;
    me.hide();
window.open(ommand.href);
    }
}
/**//*
** 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){}
}
var MSG1 = new CLASS_MSN_MESSAGE("aa",200,120,"短消息提示：","您有1封消息","懒人图库");
    MSG1.rect(null,null,null,screen.height-50);
    MSG1.speed    = 10;
    MSG1.step    = 5;
    //alert(MSG1.top);
    MSG1.show();

//同时两个有闪烁，只能用层代替了，不过层不跨框架
//var MSG2 = new CLASS_MSN_MESSAGE("aa",200,120,"短消息提示：","您有2封消息","好的啊");
// MSG2.rect(100,null,null,screen.height);
// MSG2.show();
//-->
</SCRIPT>

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