function validateComplete(formObj) 
{
	if (emptyField(formObj.bedrijfsnaam))
		alert("uw bedrijfsnaam ontbreekt");
	else if (emptyField(formObj.email))
		alert("uw e-mail adres ontbreekt");
	else if (emptyField(formObj.contactpersoon))
		alert("de contactpersoon ontbreekt");
	else if (emptyField(formObj.postcode))
		alert("de postcode ontbreekt");
	else if (emptyField(formObj.telefoon) && emptyField(formObj.mobiel))
		alert("Vul uw telefoonnummer of uw mobiele nummer in.");

	else return true;
	
	return false; 
}
function emptyField(textObj)
{
	if (textObj.value.length == 0) return true;
	for (var i=0; i<textObj.value.length; ++i) {
		var ch = textObj.value.charAt(i);
		if (ch != '' && ch != '\t') return false;
	}
	return true;
}


 function isNumberKey()
      {
      var charCode = (event.which) ? evt.which : event.keyCode
	  if (charCode > 31 && (charCode < 48 || charCode > 57) && charCode > 91 || charCode==221 || charCode==186 || charCode==187 || charCode==188 || charCode==191 || charCode==192 || charCode==219 || charCode==220 || charCode==222  || charCode==44 || charCode==46 || charCode==47  || charCode==59 || charCode==60 || charCode==61 || charCode==62 || charCode==63 || charCode==58 || charCode==34 || charCode==64 || charCode==33 || charCode==35 || charCode==36 || charCode==37 || charCode==38 || charCode==42 || charCode==34 || charCode==39 || charCode==91)
           return false;
         return true;
}
    window.onload = function(){ document.getElementById('telefoon').onkeypress = isNumberKey;
								document.getElementById('mobiel').onkeypress = isNumberKey;
	}