該方法是網友ttpy實現的，特點：
純js編寫 跨框架 無圖片 支持調速度 任意位置彈出 需要ie5.5以上
<HTML><HEAD> <SCRIPT language=JavaScript> <!-- 
/**//* 
** ================================================================================================== ** 類名：CLASS_MSN_MESSAGE ** 功能：提供類似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","今天請我吃飯哈"); MSG.show(); --------------------------------------------------------------------------------------------------- ** 作者：ttyp ** 郵件：[email protected] ** 日期：2005-3-18 ** ================================================================================================== 
**/ /**//* * 消息構造 */ 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;} /**//* * 隱藏消息方法 */ 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(){ if(me.pause==false||me.close){ 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) } } /**//* * 消息卸載事件，可以重寫 */ CLASS_MSN_MESSAGE.prototype.onunload = function() { return true; } /**//* * 消息命令事件，要實現自己的連接，請重寫它 * */ CLASS_MSN_MESSAGE.prototype.oncommand = function(){ this.close = true; this.hide(); } /**//* * 消息顯示方法 */ 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=關閉 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; 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(); } } /**//* ** 設置速度方法 **/ CLASS_MSN_MESSAGE.prototype.speed = function(s){ var t = 20; try { t = praseInt(s); } catch(e){} this.speed = t; } /**//* ** 設置步長方法 **/ 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","今天請我吃飯哈"); MSG1.rect(null,null,null,screen.height-50); MSG1.speed = 10; MSG1.step = 5; //alert(MSG1.top); MSG1.show(); //同時兩個有閃爍，只能用層代替了，不過層不跨框架 //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> <META content="MSHTML 6.00.2800.1106" name=GENERATOR></HEAD> <BODY></BODY></HTML> 原文出處：http://www.cnblogs.com/ttyp/archive/2005/03/18/121106.html