function validate(theform){
	var form_error=false
	var error_message = ""

	if( (theform.naam.value == "") || (theform.naam.value == "Name:")){
		error_message +="Gelieve uw naam in te vullen.\n\n"
		form_error = true
	}
	
	if ((theform.telefoon.value == "") || (theform.telefoon.value =='Telephone:')){
		error_message +="Gelieve uw telefonnnummer in te vullen.\n\n"
		form_error = true
	}
	
	
	
	if ((theform.email.value == "") || (theform.email.value =='Telephone:')){
		error_message +="Gelieve uw e-mailadres in te vullen.\n\n"
		form_error = true
	}
	
	if (theform.email.value.indexOf ('@',0) == -1 || theform.email.value.indexOf ('.',0) == -1) {
	  error_message +="Het e-mailveld vereist een \"@\" en een \".\" te bevatten.\n Gelieve uw e-mail adres opnieuw in te geven.\n\n"
	  form_error = true
	  } 
	if ((theform.andere.value == "") || (theform.andere.value =='Bericht:')){
		error_message +="Vul uw bericht in\n\n"
		form_error = true
	}

	if (form_error){
		alert(error_message)
		return false
	}		
return true;
	
	
}