if(isset($_POST['ragsoc'])){
$ragsoc=$_POST['ragsoc'];
while($row = mysqli_fetch_array( mysqli_query($link,'select distinct ragsocprez,indirstab,civicostab,cittastab from prezzi join operatori on ragsocprez=rasoc1 where ragsocprez=$ragsoc'))) {
		$indirstab = $row[1];
		$civicostab = $row[2];
		$cittastab = $row[3];
		}
}