function check(formulier)
	{   if (formulier.name.value=="")   
		{      alert("Vul uw naam in.");
			      return false;
   }

  else if (formulier.phone.value=="")   
  	{      alert("Vul uw telefoonnummer in.");      
  		return false;
    }
    
   else if (formulier.email.value=="")   
  	{      alert("Vul uw e-mail adres in.");      
  		return false;
    }
  	
 }