choose list1 or list2 in drop down menu

[Salvo]

Hi all

As I am not an expert, I am asking you for some help

 

I need a drop down menu to choose list1 or list 2 or list3 and the resolt to be as

 

$list

 

 

$list_sup .= '' . '<SELECT onChange="this.form.submit()">

<OPTION VALUE="blank" SELECTED>' . SUPPLIER_CHOOSE . '

<OPTION VALUE="list1">' . SUPPLIER_LIST1 . '

<OPTION VALUE="list2">' . SUPPLIER_LIST2 . '

</SELECT>';

 

$list_all = '<form method="post" action="list.php">List All:<br>' . $list_sup . '</form>';

 

I am stuck here. the must be something missing, but what?

 

Thanks Salvo