模仿QQ和MSN消息提示的效果

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你一定很喜欢像QQ或者MSN好友登录提示的效果吧，那么怎么样能在网页中实现呢？正好我在蓝色理想中发现了这段代码，贴出给大家看看（注意，如果使用以下代码，先将全角“＜＞”替换成半角的“<>”才能正常使用）：

＜SCRIPT＞
var oPopup = window.createPopup();
var popTop=50;
function popmsg(msgstr){
var winstr="＜table style=\"border: 1 solid  #FFA6CA\"  width=\"241\" height=\"172\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"  background=\"winstr+="＜tr＞＜td height=\"30\"＞ ＜/td＞＜/tr＞＜tr＞＜td align=\"center\"＞＜table width=\"90%\" height=\"110\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"＞";
winstr+="＜tr＞＜td valign=\"top\" style=\"font-size:12px; color: red; face: Tahoma\"＞"+msgstr+"＜/td＞＜/tr＞＜/table＞＜/td＞＜/tr＞＜/table＞";
oPopup.document.body.innerHTML = winstr;
popshow();
}
function popshow(){
window.status=popTop;
if(popTop＞1720){
clearTimeout(mytime);
oPopup.hide();
return;
}else if(popTop＞1520&&popTop＜1720){
oPopup.show(screen.width-250,screen.height,241,1720-popTop);
}else if(popTop＞1500&&popTop＜1520){
oPopup.show(screen.width-250,screen.height+(popTop-1720),241,172);
}else if(popTop＜180){
oPopup.show(screen.width-250,screen.height,241,popTop);
}else if(popTop＜220){
oPopup.show(screen.width-250,screen.height-popTop,241,172);
}
popTop+=10;
var mytime=setTimeout("popshow();",50);
}
＜/SCRIPT＞