function pagamenti() {

	var IMPORTO = document.PAYPAL_COMPILA.IMPORTO.value;

	var SERVIZIO = document.PAYPAL_COMPILA.SERVIZIO.value;

	var NOTE = document.PAYPAL_COMPILA.NOTE.value;
	
	var SESSION = document.PAYPAL_COMPILA.SESSION.value;

	

	 if (IMPORTO == "" || IMPORTO == "undefined") {

		   document.PAYPAL_COMPILA.IMPORTO.className="require";

		   document.PAYPAL_COMPILA.IMPORTO.focus();

		   return false;

        }

		

	 

	 if (SERVIZIO == "") {

		   document.PAYPAL_COMPILA.SERVIZIO.className="require";

		   document.PAYPAL_COMPILA.SERVIZIO.focus();

		   return false;

        }

        else {

			document.PAYPAL.item_name.value = SERVIZIO;
			
			document.PAYPAL.item_number.value = "OnLine";

			document.PAYPAL.amount.value = IMPORTO.replace(',','.');

			document.PAYPAL.custom.value = NOTE;

			document.PAYPAL.invoice.value = SESSION;

			document.PAYPAL.submit();			

        }

  }