function $(id) {
	return document.getElementById(id);
}
function checkForm(formId) {
	var ok = true;
  $('message')["style"]["display"] = "none";
  $('label-one').removeAttribute("class");
  $('bedrijf')["style"]["border"] = "";
  $('label-two').removeAttribute("class");
  $('straat')["style"]["border"] = "";
  $('label-three').removeAttribute("class");
  $('postcode')["style"]["border"] = "";
  $('label-four').removeAttribute("class");
  $('plaats')["style"]["border"] = "";
  $('label-five').removeAttribute("class");
  $('telefoon')["style"]["border"] = "";
  $('label-six').removeAttribute("class");
  $('email')["style"]["border"] = "";
  $('label-seven').removeAttribute("class");
  $('vraag')["style"]["border"] = "";
  
  if($('bedrijf')["value"] == "") {
    $('label-one')["className"] = "red";
	  $('bedrijf')["style"]["border"] = "1px solid #CC3300";
    ok = false;
  }
  if($('straat')["value"] == "") {
    $('label-two')["className"] = "red";
	  $('straat')["style"]["border"] = "1px solid #CC3300";
    ok = false;
  }
  if($('postcode')["value"] == "") {
    $('label-three')["className"] = "red";
	  $('postcode')["style"]["border"] = "1px solid #CC3300";
    ok = false;
  }
  if($('plaats')["value"] == "") {
    $('label-four')["className"] = "red";
	  $('plaats')["style"]["border"] = "1px solid #CC3300";
    ok = false;
  }
  if($('telefoon')["value"] == "") {
    $('label-five')["className"] = "red";
	  $('telefoon')["style"]["border"] = "1px solid #CC3300";
    ok = false;
  }
  var filter = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if($('email')["value"] == "" || !filter.test($('email')["value"])) {
    $('label-six')["className"] = "red";
	  $('email')["style"]["border"] = "1px solid #CC3300";
    ok = false;
  }
  if($('vraag')["value"] == "") {
    $('label-seven')["className"] = "red";
	  $('vraag')["style"]["border"] = "1px solid #CC3300";
    ok = false;
  }
  if(!ok) {
    $('message')["style"]["display"] = "block";
    return;
  }
  $(formId).submit();
}