Código PHP:
echo "<select name=\"f_tipoeq[".$i."]\">";
$tok = strtok( $cb_TipoEq, "," );
while( $tok ) {
$tok1 = strtok( "," );
$selected = ($tok == $f_tipoeq[$i])?"selected":"";
echo "<option value=\"$tok\" $selected>$tok1</option>";
$tok = strtok( "," );
}
echo"</select>";
necesito dejarlo invisible, se puede?