problem z ujawnianiem obiektu Opcje

[Szakal]

witam... Mam tabelkę:

[HTML] pobierz, plaintext 
<table cellpadding=0 cellspacing=0><tr><td><input type=text border=0></td><td><input type=button onclick="MakeAvisible('fNames')"></td></tr></table>
 
 
<table id='fNames' cellspacing=1 cellpadding=0 width=300 border=0 style="visibility: hidden; BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; BORDER-LEFT: black 1px solid; BORDER-BOTTOM: black 1px solid; position: absolute;">
  <tr>
    <td id="td1" onMouseOver="msON(this.id)" onMouseOut="msOut(this.id)"><font face=System id="td1f">Times New Roman</font></td></tr>
  <tr>
    <td id="td2" onMouseOver="msON(this.id)" onMouseOut="msOut(this.id)"><font face=System id="td2f">Arial</font></td></tr>
  <tr>
    <td id="td3" onMouseOver="msON(this.id)" onMouseOut="msOut(this.id)"><font face=System id="td3f">Arial Black</font></td></tr>
  <tr>
    <td id="td4" onMouseOver="msON(this.id)" onMouseOut="msOut(this.id)"><font face=System id="td4f">Arial Narrow</font></td></tr>
  <tr>
    <td id="td5" onMouseOver="msON(this.id)" onMouseOut="msOut(this.id)"><font face=System id="td5f">Verdana</font></td></tr></table>
[HTML] pobierz, plaintext 

chciałbym uwidocznić tę tabelkę robię to tym sposobem:

[HTML] pobierz, plaintext 
<script language="javascript">
function MakeAvisible(OBid){
document.GetElementById(OBid).style.visibility = "visible";
}
</script>
[HTML] pobierz, plaintext 

wg mnie wszystko jest OK ale explorer wyświetla błąd: "Obiekt nie obsługuje tej właściwości lub metody" WHYYYY??