dropdown boxes

[wxdqz]

Can anyone help me change these checkboxes into a dropdown box?


function hilite_elem (checkbox, element_name)
{
var svgobj;
var svgstyle;
var svgdoc= document.levels.getSVGDocument();

// For each element, get the element's style object, then set
// its visibility according to the state of the checkbox.

svgobj = svgdoc.getElementById(element_name);
svgstyle = svgobj.getStyle();
if (!checkbox.checked)
{
// Hide level.
svgstyle.setProperty('visibility', 'hidden');
}
else
{
// SHow level.
svgstyle.setProperty('visibility', 'visible');
}

}
// -->
</SCRIPT>
<FORM NAME="hilite_form">
<CENTER>
<P>
<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="2" WIDTH="1000">
<TR>
<TD COLSPAN="2">Visible Levels:<BR>
&nbsp;</TD>
</TR>
<TR>
<TD><INPUT TYPE="checkbox" VALUE=http://www.webdeveloper.com/forum/archive/index.php/"" ONCLICK="hilite_elem(this,'level1')">Level 1</TD>
<TD><INPUT TYPE="checkbox" VALUE=http://www.webdeveloper.com/forum/archive/index.php/"" ONCLICK="hilite_elem(this,'level4')">Level 4</TD>
</TR>
<TR>
<TD><INPUT TYPE="checkbox" VALUE=http://www.webdeveloper.com/forum/archive/index.php/"" ONCLICK="hilite_elem(this,'level2')">Level 2</TD>
<TD><INPUT TYPE="checkbox" VALUE=http://www.webdeveloper.com/forum/archive/index.php/"" ONCLICK="hilite_elem(this,'level5')">Level 5</TD>
</TR>
<TR>
<TD><INPUT TYPE="checkbox" VALUE=http://www.webdeveloper.com/forum/archive/index.php/"" ONCLICK="hilite_elem(this,'level3')">Level 3</TD>
<TD><INPUT TYPE="checkbox" VALUE=http://www.webdeveloper.com/forum/archive/index.php/"" ONCLICK="hilite_elem(this,'level6')">Level 6</TD>
</TR>
</TABLE>
</CENTER>