Showing data with onchange from SLECT menu - what's the best way ??

[spacepoet]

Hello:

 

I have a SELECT dropdown menu that works like this:

<?php

$states_arr = array('AL'=>"Alabama",'AK'=>"Alaska",'AZ'=>"Arizona",'AR'=>"Arkansas",'CA'=>"California",'CO'=>"Colorado",'CT'=>"Connecticut",'DE'=>"Delaware",'DC'=>"District Of Columbia",'FL'=>"Florida",'GA'=>"Georgia",'HI'=>"Hawaii",'ID'=>"Idaho",'IL'=>"Illinois", 'IN'=>"Indiana", 'IA'=>"Iowa",  'KS'=>"Kansas",'KY'=>"Kentucky",'LA'=>"Louisiana",'ME'=>"Maine",'MD'=>"Maryland", 'MA'=>"Massachusetts",'MI'=>"Michigan",'MN'=>"Minnesota",'MS'=>"Mississippi",'MO'=>"Missouri",'MT'=>"Montana",'NE'=>"Nebraska",'NV'=>"Nevada",'NH'=>"New Hampshire",'NJ'=>"New Jersey",'NM'=>"New Mexico",'NY'=>"New York",'NC'=>"North Carolina",'ND'=>"North Dakota",'OH'=>"Ohio",'OK'=>"Oklahoma", 'OR'=>"Oregon",'PA'=>"Pennsylvania",'RI'=>"Rhode Island",'SC'=>"South Carolina",'SD'=>"South Dakota",'TN'=>"Tennessee",'TX'=>"Texas",'UT'=>"Utah",'VT'=>"Vermont",'VA'=>"Virginia",'WA'=>"Washington",'WV'=>"West Virginia",'WI'=>"Wisconsin",'WY'=>"Wyoming");
    
    function showOptionsDrop($array){
        $string = '';
        foreach($array as $k => $v){
            $string .= '<option value="'.$k.'"'.$s.'>'.$v.'</option>'."\n";
        }
        return $string;
    }
?>

<form>

<select name="states">
    <option value="0">Choose a state</option>
    <?php echo showOptionsDrop($states_arr); ?>
</select>


</form>

 

I would like to show all the towns/zipcodes for each individual state with an "onchange" from the SELECT menu.

 

The table is called "zip_codes" and the City/Zip Codes are called "city" and "zip"

 

What I would like to do is display them as links, so a user can click into each town and either create a new entry (a restaurant) or update an existing entry.

 

What would be the best approach for this?

 

I appreciate the help.