JavaScript places Image Behind drop-down form

Hello.  

The code below is causing the color selection image to appear behind the drop-down box, so that it says "Percent" on top of the colors.

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<br /><br /><br /><br />
<script>
function getInfoAndUpdate()
{
   if (isNaN(formNumRows.value))
   {
      alert ("The rows field can only contain numbers");return;
   }
   else if (isNaN(formNumCols.value))
   {
      alert ("The colums field can only contain numbers");return;
   }
   var callerWindowObj = dialogArguments;
   callerWindowObj.rtNumRows = formNumRows.value;
   callerWindowObj.rtNumCols = formNumCols.value;
   callerWindowObj.rtTblCellspacing = formCellspacing.value;
   callerWindowObj.rtTblCellspadding = formCellspadding.value;
   callerWindowObj.rtTblAlign = formTblAlign.value;
   callerWindowObj.rtTblWidth = formTblWidth.value + formTblWidthtype.value;
   callerWindowObj.rtTblBorder = formTblBorder.value;
   callerWindowObj.rtTblBgColor = Bgcolor.value;
   callerWindowObj.rtTblBrColor = Brcolor.value;
   callerWindowObj.createTable();
   window.close();
}
</script>
<script language=JavaScript>
<!--

function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

function show(val2) {
Bgcolor.value = ' bgcolor="'+val2+'"';
B3.style.backgroundColor = val2;
}
function showM(val3) {
Brcolor.value = ' bordercolor="'+val3+'"';
B2.style.backgroundColor = val3;
}
//-->
</script>

<script language=javascript>
<!--

var isNS = (navigator.appName == "Netscape") ? 1 : 0;
var EnableRightClick = 0;
if(isNS)
document.captureEvents(Event.MOUSEDOWN||Event.MOUSEUP);
function mischandler(){
  if(EnableRightClick==1){ return true; }
  else {return false; }
}
function mousehandler(e){
  if(EnableRightClick==1){ return true; }
  var myevent = (isNS) ? e : event;
  var eventbutton = (isNS) ? myevent.which : myevent.button;
  if((eventbutton==2)||(eventbutton==3)) return false;
}
function keyhandler(e) {
  var myevent = (isNS) ? e : window.event;
  if (myevent.keyCode==96)
    EnableRightClick = 1;
  return;
}
document.oncontextmenu = mischandler;
document.onkeypress = keyhandler;
document.onmousedown = mousehandler;
document.onmouseup = mousehandler;
//-->
</script>


<table align="center" border="0" cellpadding="0" cellspacing="0" width="400">
      <tr>
            <td>Table Width:</td>
            <td colspan="3">
                  <input id=formTblWidth size="3" value="100">
                  <select id=formTblWidthtype size="1">
                        <option value="%">Percent</option>
                        <option value="">Pixels</option>
                  </select>
            </td>
      </tr>
      <tr>
            <td>Cell Colour:</td>
            <td><input name="B3" id="B3" onmouseout="MM_showHideLayers('Bgc','','hide');" onmouseover="MM_showHideLayers('Bgc','','show');" style="BACKGROUND-COLOR: #cccccc; BORDER-BOTTOM-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px; BORDER-TOP-WIDTH: 0px; CURSOR: hand; WIDTH: 25px" type='button' value=" "></td>
            <td>Border Colour: </td>
            <td><input name="B2" id="B2" onmouseout="MM_showHideLayers('Brc','','hide');" onmouseover="MM_showHideLayers('Brc','','show');" style="BACKGROUND-COLOR: #cccccc; BORDER-BOTTOM-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px; BORDER-TOP-WIDTH: 0px; CURSOR: hand; WIDTH: 25px" type='button' value=" ">
                  <input name="Bgcolor" id="Bgcolor" type="hidden">
                  <input name="Brcolor" id="Brcolor" type="hidden">
            </td>
      </tr>
</table>
<br>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
      <tr>
            <td width="50%" align="right"><input value="OK" type=button onclick='getInfoAndUpdate();'>&nbsp;</td>
            <td width="50%" align="left">&nbsp;<input value="Cancel" type=button onclick='window.close();'></td>
      </tr>
</table>
<DIV id=Brc onmouseout="MM_showHideLayers('Brc','','hide');"
onmouseover="MM_showHideLayers('Brc','','show');"
style="HEIGHT: 67px; LEFT: 120px; POSITION: absolute; TOP: 100px; VISIBILITY: hidden; WIDTH: 289px; Z-INDEX: 1"><A><IMG
border=0 height=67 src="images/colortable.gif"
useMap=#colmapMap2Map width=289></A><MAP name=colmapMap2Map>
<AREA coords=1,1,7,10 onClick="javascript:showM('#00FF00');" shape=RECT></MAP></DIV>
<DIV id=Bgc onmouseout="MM_showHideLayers('Bgc','','hide');"
onmouseover="MM_showHideLayers('Bgc','','show');"
style="HEIGHT: 67px; LEFT: 75px; POSITION: absolute; TOP: 100px; VISIBILITY: hidden; WIDTH: 289px; Z-INDEX: 1"><A><IMG
border=0 height=67 src="images/colortable.gif"
useMap=#colmapMap2MapMap width=289></A><MAP name=colmapMap2MapMap>
<AREA coords=1,1,7,10 onClick="javascript:show('#00FF00');" shape=RECT></MAP></DIV>
</body>
</html>