// JavaScript Document
function check(form)
{
   if (form.voorletter.value=="")
   {
      alert("Please fill in your initials");
      return false;
   }
   else if (form.achternaam.value=="")
   {
      alert("Please fill in your lastname");
      return false;
   }
	 else if (form.email.value=="")
   {
      alert("Please fill your e-mail in");
      return false;
   }
	 else if (form.onderwerp.value=="")
   {
      alert("Please fill in a subject");
      return false;
   }
	 else if (form.commentaar.value=="")
   {
      alert("Please write your statement/question");
      return false;
   }
}