inserting data from a dropbox intoa textbox

[beastylad]

Hi  have a dropbox in php and it works fine btu i want the data selected to go into a textbox:

 

Current Drop Box

 

<?php
$sql = mysql_query("SELECT * FROM favourite_destinations WHERE User_ID =$userid"); 
	while($row = mysql_fetch_array($sql)){
		$uid = $row["User_ID"];
		$username = $row["Name"]; 
		echo '<option value="'.$uid.'">'.$username.'</option>' ;

	}
?>

 

name="Customer_Destination" is the name of the textbox

 

I know in javascript u can have a

onchange="document.theform.Customer_Destination.value=this.value"

but the drop box stops working when i put this into the select tag name outside of the Php

 

any help how i coudl achive this ?

 

[Muddy_Funster]

this isn't something you can do with PHP