and compare to the select data
from the submit
$myselectvar=$_POST['myselectbox'];
then
really easy if the drop down is db driven
echo "<select name=\'myselectbox\'>
while ($row=mysql_fetch_array($result)
$item=$row['item'];
if ($rowfromdbvalue==$myselectvar){
echo "<option value=$item SELECTED>$item</option>";
}else{
echo "<option value=$item>$item</option>";
}
} //end loop
hth