function checkkontaktformular() {

	if (document.kontaktformular.name.value == "Your name" || document.kontaktformular.name.value == " ") {

		alert("Please insert your name!");
		document.kontaktformular.name.focus();
		return false;

 	} else if (document.kontaktformular.email.value == "Your eMail" || document.kontaktformular.email.value == " ") {

		alert("Please insert your eMail!");
		document.kontaktformular.email.focus();
		return false;

 	} else if (document.kontaktformular.betreff.value == "Subject of your message" || document.kontaktformular.betreff.value == " ") {

		alert("Please insert a subject!");
		document.kontaktformular.betreff.focus();
		return false;

 	} else if (document.kontaktformular.text.value == "Your message" || document.kontaktformular.text.value == " ") {

		alert("Please enter a message!");
		document.kontaktformular.text.focus();
		return false;

 	}

}