// JavaScript Document
function check(form)
{
   if (form.achternaam.value=="")
   {
      alert("Please fill in your last name");
      return false;
   }
   else if (form.telefoon.value=="")
   {
      alert("Please fill in your phone number");
      return false;
   }
	 else if (form.postcode_a.value=="")
   {
      alert("Please fill in the zipcode or streetname of the pick up address");
      return false;
   }
	 else if (form.huisnummer_a.value=="")
   {
      alert("Please fill in the number of the pick up address");
      return false;
   }
	 else if (form.plaats_a.value=="")
   {
      alert("Please fill in the place of the pick up address");
      return false;
   }
	 else if (form.postcode_b.value=="")
   {
      alert("Please fill in the zipcode or streetname of the destination");
      return false;
   }
	 else if (form.huisnummer_b.value=="")
   {
      alert("Please fill in the number of the destination");
      return false;
   }
	 else if (form.plaats_a.value=="")
   {
      alert("Please fill in the place of the destination");
      return false;
   }
   	 else if (form.datum.value=="")
   {
      alert("Please provide us with your preferred transportation date");
      return false;
   }
   	 else if (form.tijd.value=="")
   {
      alert("Please provide us with your preferred time of transportation");
      return false;
   }
     else 
   {
      return true;
   }
}