[Deff]

sashgera,
Чо нидь типо так - поправите если что не так:

<div id="dropin" 

style="position:fixed;visibility:hidden;left:40%;top:500px;width:430px;height:430px;background-co

lor:#EBEBEB">
<div align="right"><a href="action.php" onClick="dismissbox();return false">
<img src="banner/img/close.png" border=0 vspace=0 hspace=0 align="right" width="15" height="15" 

alt="закрыть"/>
</a></div>
<p><center><font style="font-size:19px; color:#FF0000;">Здесь текст</font><br><br><a 

href="action.php"><img src="banner/img/glass_banner.png"   border="0"></a><br><br>
<a href="action.php"><b>Подробнее>>></b></a>
</center></p>
</div>


<script>
function setcookie(a,b,c) {if(c){var d = new Date();d.setTime(d.getTime()+c);}if(a && b) document.cookie = a+'='+b+(c ? '; expires='+d.toUTCString() : '');else return false;}
function getcookie(a) {var b = new RegExp(a+'=([^;]){1,}');var c = b.exec(document.cookie);if(c) c = c[0].split('=');else return false;return c[1] ? c[1] : false;}


var ie=document.all
var dom=document.getElementById
var ns4=document.layers
var calunits=document.layers? "" : "px"

var bouncelimit=32 //(must be divisible by 8)
var direction="up"

function initbox(){

  if (!dom&&!ie&&!ns4) return;
  crossobj=(dom)?document.getElementById("dropin").style : ie? document.all.dropin : document.dropin
  scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
  crossobj.top=scroll_top-250+calunits
  crossobj.visibility=(dom||ie)? "visible" : "show"
  dropstart=setInterval("dropin()",25)
}

function dropin(){
  scroll_top=(ie)? truebody().scrollTop : window.pageYOffset
  if (parseInt(crossobj.top)<100+scroll_top)
     crossobj.top=parseInt(crossobj.top)+40+calunits
  else{
     clearInterval(dropstart)
     bouncestart=setInterval("bouncein()",50)
  }
}

function bouncein(){
  crossobj.top=parseInt(crossobj.top)-bouncelimit+calunits
  if (bouncelimit<0){ bouncelimit+=8;
      bouncelimit=bouncelimit*-1;
  }

  if (bouncelimit==0) clearInterval(bouncestart)
}

function dismissbox(){
  if (window.bouncestart) clearInterval(bouncestart)
  crossobj.visibility="hidden"
}
function truebody(){
   return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function dropornot(){
  if (!getcookie("droppedin")||!getcookie("Session")){ //Если хотя бы одного кука  нет  - перезапускаем
     setcookie("Session",true) ;//Кук на сессию;
     setcookie("droppedin",true,1*60*1000) ;//Кук на минуту

     window.onload=initbox; //Запуск 
 }
} dropornot();
</script>