function checkMailForm ( form )
{
  	  var email = true;
	  
	  if (form.naam.value == ""){ 
		document.getElementById("myName").style.borderColor='#FF0000';
		document.getElementById("naamlabel").innerHTML = 'Naam: is verplicht in te vullen';
	   	email = false ;
	  }else {
	  	document.getElementById("myName").style.borderColor='#00FF00';
	  	document.getElementById("naamlabel").innerHTML = 'Naam oke:';
	  }
	  
	  if (form.address.value == ""){ 
		document.getElementById("myAddress").style.borderColor='#FF0000';
		document.getElementById("addresslabel").innerHTML = 'Adres: is verplicht in te vullen';
	   	email = false ;
	  }else {
	  	document.getElementById("myAddress").style.borderColor='#00FF00';
	  	document.getElementById("addresslabel").innerHTML = 'Adres oke:';
	  }
	  
 	  
	  if (form.postalcode.value == ""){ 
		document.getElementById("myPostalcode").style.borderColor='#FF0000';
		document.getElementById("postalcodelabel").innerHTML = 'Postcode: is verplicht in te vullen';
	   	email = false ;
	  }else {
	  	document.getElementById("myPostalcode").style.borderColor='#00FF00';
	  	document.getElementById("postalcodelabel").innerHTML = 'Postcode oke:';
	  }
	  
	  if (form.city.value == ""){ 
		document.getElementById("myCity").style.borderColor='#FF0000';
		document.getElementById("citylabel").innerHTML = 'Plaatsnaam: is verplicht in te vullen';
	   	email = false ;
	  }else {
	  	document.getElementById("myCity").style.borderColor='#00FF00';
	  	document.getElementById("citylabel").innerHTML = 'Plaatsnaam oke:';
	  }
	  
	 if (form.mail.value == ""){ 
		document.getElementById("myEmail").style.borderColor='#FF0000';
		document.getElementById("emaillabel").innerHTML = 'E-mail: is verplicht in te vullen';
	   	email = false ;
	  } else {
		  document.getElementById("myEmail").style.borderColor='#00FF00';
		  document.getElementById("emaillabel").innerHTML = 'E-mail oke:';
	  }
	  
	  if(form.mail.value != ""){
	  	var str=form.mail.value;
		var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if (filter.test(str)){
		document.getElementById("emaillabel").innerHTML = 'E-mail validatie oke:';
		document.getElementById("myEmail").style.borderColor='#00FF00';
		}else{
		document.getElementById("emaillabel").innerHTML = 'E-mail: je moet een geldig emailadres invullen';
		document.getElementById("myEmail").style.borderColor='#FF0000';
		email=false
		}
		
	  }

	  if (form.onderwerp.value == ""){ 
		document.getElementById("mySubject").style.borderColor='#FF0000';
		document.getElementById("onderwerplabel").innerHTML = 'Onderwerp: is verplicht in te vullen';
	   	email = false ;
	  } else {
	  	document.getElementById("onderwerplabel").innerHTML = 'Onderwerp oke:';
		document.getElementById("mySubject").style.borderColor='#00FF00';
	  }
	  
	  if (form.bericht.value == ""){ 
		document.getElementById("myRemark").style.borderColor='#FF0000';
		document.getElementById("remarklabel").innerHTML = 'Bericht: is verplicht in te vullen';
	   	email = false ;
	  } else {
	  	document.getElementById("remarklabel").innerHTML = 'Bericht oke:';
		document.getElementById("myRemark").style.borderColor='#00FF00';
	  }

return email;
}