function chkFormular () {
    var ncol = "#E6E6E6";
	var ncolb = "#E6E6E6";
	document.getElementById("vorname").style.borderColor = ncolb;
    document.getElementById("name").style.borderColor = ncolb;
    document.getElementById("email").style.borderColor = ncolb;
  if (document.Formular.vorname.value == "") {
    document.Formular.vorname.style.borderColor = "#FF4A4A"
	alert("Bitte Ihren Vornamen eingeben!");
    document.Formular.vorname.focus();
    return false;
  }
  if (document.Formular.name.value == "") {
    document.getElementById("name").style.borderColor = "#FF4A4A"
	alert("Bitte Ihren Namen eingeben!");
    document.Formular.name.focus();
    return false;
  }
  if (document.Formular.email.value == "") {
    document.getElementById("email").style.borderColor = "#FF4A4A"
	alert("Bitte Ihre E-Mail-Adresse eingeben!");
    document.Formular.email.focus();
    return false;
  }
  if (document.Formular.email.value.indexOf("@") == -1) {
    document.getElementById("email").style.borderColor = "#FF4A4A"
    alert("Keine E-Mail-Adresse!");
    document.Formular.email.focus();
    return false;
  }

}