在ASP.net下实现像QQ或迅雷一样的从下面浮上个提醒消息框

<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=/"背景图片地址/" >";

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:文字大小; color: 文字颜色; 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();",20);

}

popmsg("文本信息");

</script>