echk=/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
function checkform (send) {
	if (send.first1.value == ""){
	alert( "Please enter your first name." );
	send.first1.focus();
	return false ;
	}
	if (!(send.first1.value == "") && (send.last1.value == "")){
	alert( "Please enter your last name." );
	send.last1.focus();
	return false ;
	}
	if (!(send.first2.value == "") && (send.last2.value == "")){
	alert( "Please your guest's last name." );
	send.last2.focus();
	return false ;
	}
	if (!(send.first3.value == "") && (send.last3.value == "")){
	alert( "Please your guest's last name." );
	send.last3.focus();
	return false ;
	}	
	if (!(send.first4.value == "") && (send.last4.value == "")){
	alert( "Please your guest's last name." );
	send.last4.focus();
	return false ;
	}	
	if (!(send.first5.value == "") && (send.last5.value == "")){
	alert( "Please your guest's last name." );
	send.last5.focus();
	return false ;
	}			
	if (!(send.first6.value == "") && (send.last6.value == "")){
	alert( "Please your guest's last name." );
	send.last6.focus();
	return false ;
	}			
	if (!(send.first7.value == "") && (send.last7.value == "")){
	alert( "Please your guest's last name." );
	send.last7.focus();
	return false ;
	}			
	if (!(send.first8.value == "") && (send.last8.value == "")){
	alert( "Please your guest's last name." );
	send.last8.focus();
	return false ;
	}
	if (!(send.first9.value == "") && (send.last9.value == "")){
	alert( "Please your guest's last name." );
	send.last9.focus();
	return false ;
	}
	if (!(send.first10.value == "") && (send.last10.value == "")){
	alert( "Please your guest's last name." );
	send.last3.focus();
	return false ;
	}					
	if (!(send.first11.value == "") && (send.last11.value == "")){
	alert( "Please your guest's last name." );
	send.last11.focus();
	return false ;
	}	
		if (!(echk.test(send.email.value))) {
		alert( "Please enter a valid email address." );
		send.email.focus();
		return false ; 
		}
		if (!(send.email2.value == "") && (!(echk.test(send.email2.value)))) {
		alert( "Please enter a valid email address for your 2nd guest or leave it empty." );
		send.email2.focus();
		return false ; 
		}
		if (!(send.email3.value == "") && (!(echk.test(send.email3.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email3.focus();
		return false ; 
		}		
		if (!(send.email4.value == "") && (!(echk.test(send.email4.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email4.focus();
		return false ; 
		}			
		if (!(send.email5.value == "") && (!(echk.test(send.email5.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email5.focus();
		return false ; 
		}
		if (!(send.email6.value == "") && (!(echk.test(send.email6.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email3.focus();
		return false ; 
		}
		if (!(send.email7.value == "") && (!(echk.test(send.email7.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email7.focus();
		return false ; 
		}
		if (!(send.email8.value == "") && (!(echk.test(send.email8.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email8.focus();
		return false ; 
		}
		if (!(send.email9.value == "") && (!(echk.test(send.email9.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email9.focus();
		return false ; 
		}
		if (!(send.email10.value == "") && (!(echk.test(send.email10.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email3.focus();
		return false ; 
		}
		if (!(send.email11.value == "") && (!(echk.test(send.email11.value)))) {
		alert( "Please enter a valid email address for your 3rd guest or leave it empty." );
		send.email3.focus();
		return false ; 
		}
			if (((send.first2.value && send.last2.value) || (send.first3.value && send.last3.value) || (send.first4.value && send.last4.value) || (send.first5.value && send.last5.value) || (send.first6.value && send.last6.value) || (send.first7.value && send.last7.value) || (send.first8.value && send.last8.value) || (send.first9.value && send.last9.value) || (send.first10.value && send.last10.value) || (send.first11.value && send.last11.value)) == "") {
			input_box=confirm("You have not entered any guest names.\r\rAre you sure you want to continue?");
				if (input_box==false) {
				return false ;
				}
			}
return (true)
}