function formControl(which, ev) {
	
	if(which.id == "name") {
		if(which.value == "Name" && ev == 1) which.value = "";
		else if(which.value == "" && ev == 2) which.value = "Name";
	}
	
	if(which.id == "email") {
		if(which.value == "E-Mail-Adresse" && ev == 1) which.value = "";
		else if(which.value == "" && ev == 2) which.value = "E-Mail-Adresse";
	}
	
	if(which.id == "nachricht") {
		if(which.value == "Nachricht" && ev == 1) which.value = "";
		else if(which.value == "" && ev == 2) which.value = "Nachricht";
	}
}