auto populate multiple list menu based on mysql

[amel86]

hello..
i have a question about how to make dependent list menu based on mysql?

actually, i already found some code that helped me a lot but there has a problem that is i want to change 'get' method to 'post' method.
can u all help me or guide me how to change this code.

thank you

<?php 
$state = $county = null; //declare vars 

$conn = mysql_connect("localhost", "root", "12345"); 
$db = mysql_select_db('test',$conn); 

if(isset($_GET["state"]) && is_numeric($_GET["state"])) 
{ 
$state = $_GET["state"]; 
} 

if(isset($_GET["county"]) && is_numeric($_GET["county"])) 
{ 
$county = $_GET["county"]; 
} 
?> 

<script language="JavaScript"> 
function autoSubmit() 
{ 
var formObject = document.forms['theForm']; 
formObject.submit(); 
} 
</script> 

<form name="theForm" method="get"> 


<select name="state" onChange="autoSubmit();"> 
<option value="state">Select State</option> 
<?php 
$sql = "SELECT * FROM cat_state"; 
$countries = mysql_query($sql,$conn); 
while($row = mysql_fetch_array($countries)) 
{ 
echo ("<option value=\"$row[state_id]\" " . ($state == $row["state_id"]? " selected" : "") . ">$row[state]</option>"); 
} 
?> 
</select> 

<?php 
if($state!= null && is_numeric($state)) 
{ 
?> 

<select name="county" onChange="autoSubmit();"> 
<option value="county">Select County</option> 

<?php 
$sql = "SELECT * FROM cat_county WHERE state_id = $state "; 
$countys = mysql_query($sql,$conn); 
while($row = mysql_fetch_array($countys)) 
{ 
echo ("<option value=\"$row[county_id]\" " . ($county == $row["county_id"]? " selected" : "") . ">$row[county]</option>"); 
} 
?> 
</select> 
<?php 
} 
?>

[code green]

Just edit $_GET to $_POST and change web form "method = post".
But remember $_GET can also read URL variables