footer er altid i toppen, hjælp!

jeg har en hel masse css, men desværre kan jeg ikke placere min footer i bunden. Den viser sig altid i toppen.

Er der nogle der kan hjælpe mig?



herunder er mit css:

#news{
    position:absolute;
    height: 490px;
    width: 120px;
    background-color:#eee8ff;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 10px;
    border-left-width: 1px;
    border-left-style: solid;
    border-left-color: #0099CC;
    border-right-width: 2px;
    border-right-style: solid;
    border-right-color: #CCCCCC;
    text-align: center;
    padding-top: 10px;
    top: 102px;
    left: 636px;
}

#menu_left{
    position:absolute;
    width:125px;
    height: 490px;
    top:102px;
    left:0px;
    background-color:#EEE8FF;
    text-align:left;
    font-family:Verdana, Arial, Helvetica, sans-serif;
    color:#000000;
    border-top: #eee8ff;
    border-right-width: 1px;
    border-right-style: solid;
    border-right-color: #0099CC;
    font-size: 10px;
    border-left-color: #CCCCCC;
    border-left-width: 2px;
    border-left-style: solid;
    padding-top: 10px;
    padding-left: 5px;
    padding-right: 5px;
}

#mainbox_link{
    position:absolute;
    width: 455px;
    height: 490px;
    top:102px;
    left:140px;
    color:#000000;
    text-align: justify;
    padding-top: 10px;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 11px;
    padding-right: 20px;
    padding-left: 20px;
}

#fotter{
    position:absolute;
    height:auto;
    width: 100%;
    left:0px;
    bottom:-500px;
    background-color:#0099CC;
    font-size:9px;
    color:#FFFFFF;
    z-index:99;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    border-right-color: #CCCCCC;
    border-bottom-color: #CCCCCC;
    border-left-color: #CCCCCC;
    text-align: center;
    border-right-width: 2px;
    border-bottom-width: 2px;
    border-left-width: 2px;
    border-right-style: solid;
    border-bottom-style: solid;
    border-left-style: solid;

   
    }

#menu{
    position:absolute;
    font-size:10px;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    color: #333333;
    height: 20px;
    width: 760px;
    background-color: #0099CC;
    text-align: center;
    padding-top: 2px;
    left:0px;
    top:80px;
}

#placeholder{
    position:absolute;
    width:760px;
    height:auto;
    margin-left: -380px;
    left:387px;
    top: 40px;
}

/* The rules for the header in the document */
#header {
    position:absolute;
    width:760px;
    height:75px;
    left:0px;
    top:0px;
    color:black;
    text-align:center;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    background-image: url(billeder/header.gif);

}



her er mit html til dette:

<div id="placeholder">
    <div id="header">
    </div>
   
   
    <div id="menu">
    <!--#include file="menu.txt"-->
    </div>
   
    <div id="menu_left">
    <!--#include file="menu_kurs.txt"-->
    </div>
   
    <div id="mainbox_link">
<%
    set uddTekst = server.CreateObject("scripting.FileSystemObject")
    set laesTekst = uddTekst.openTextFile ("d:\web\testmig.dk\www\hih\mir\Tekst\Kursister.txt")

    resultatet = ""
        Do While not laesTekst.AtEndOfStream
    resultatet = resultatet & laesTekst.ReadLine
        Loop
    laesTekst.Close
   
    resultatet = replace(resultatet,"•","<li>")
    response.Write(resultatet)
%>
    </div>
   
    <div id="news">
      <!--#include file="news.txt"-->
    </div>
   
        <div id="fotter">
    <!--#include file="fotter.txt"-->
    </div>
   
</div>