function getAllR($Region_id) {
		//returns an array with city info
		$query="SELECT * FROM cityinfo where Region_index='$Region_id'";
		$result=mysql_query($query);
		if (!$result)
			return false;
		else {
			$i=0;
			$returnArray=array();
			while ($row=mysql_fetch_array($result)) {
				$returnArray[$i]=new city();
				$returnArray[$i]->City_id=$row['City_id'];
				$returnArray[$i]->Region_index=$row['Region_index'];
				$returnArray[$i]->displayName=$row['City_name'];
				$i++;
			}	
			return $returnArray;	
		}
	}

$cities=region::getAllR();
					if (!isError($cities)){
						foreach ($cities as $element => $value) {
							echo '<option value="'.$value->City_id.'"';
							if ($value->City_id=='$city')
								echo ' selected="selected"';
							echo '>'.$value->displayName.'</option>';
						}
					}
				}