function check()
{	
		if(document.kontakt.Vorname.value == "")
			{
			alert('Please enter your first name!');
			document.kontakt.Vorname.select();
			document.kontakt.Vorname.focus();
			return false;
			}
		else
			{
				if(document.kontakt.Nachname.value == "")
					{
					alert('Please enter your second name!');
					document.kontakt.Nachname.select();
					document.kontakt.Nachname.focus();
					return false;
					}
				else
					{
						if(document.kontakt.Strasse.value == "")
							{
							alert('Please enter your adress!');
							document.kontakt.Strasse.select();
							document.kontakt.Strasse.focus();
							return false;
							}
						else	
							{
								if(document.kontakt.PLZ_Ort.value == "")
									{
									alert('Please enter your postal code!');
									document.kontakt.PLZ_Ort.select();
									document.kontakt.PLZ_Ort.focus();
									return false;
									}
								else	
									{
												if((document.kontakt.eMail.value.indexOf('@') == -1) || (document.kontakt.eMail.value.indexOf('.') == -1))
													{
   														alert("This email-adress is not right!");
														document.kontakt.eMail.select();
														document.kontakt.eMail.focus();
														return false;
													}
												else
													{
														document.kontakt.submit();
													}		
									}
							}
						}
				}
		}