how do I save the selected value from the drop down list below into a mysql database? (the drop down list fetchs records from a table in the database)

<?php
print "Select Hairdresser: ";
$query="SELECT Staff_Name, Staff_Surname,id FROM staff ORDER BY Staff_Surname ASC";
$result = mysql_query ($query);
echo "<select name=Staff_Name, Staff_Surname value=''>Staff</option>";
while($nt=mysql_fetch_array($result)){
echo "<option value=$nt[id]>$nt[Staff_Name] $nt[Staff_Surname]</option>";}
echo "</select>";
?>