function formularpruefung(){
     
      if(document.formular.name.value == ""){
       alert("Please, enter your Last Name.");
       document.formular.name.focus();
       return false;
	}
      if(document.formular.vorname.value == ""){
       alert("Please, enter your First Name.");
       document.formular.vorname.focus();
       return false;
	}
      if(document.formular.strasse.value == ""){
       alert("Please, enter your Street and Housenumber.");
       document.formular.strasse.focus();
       return false;
	}
      if(document.formular.plz.value == ""){
       alert("Please, enter your Post Code.");
       document.formular.plz.focus();
       return false;
	}
      if(document.formular.ort.value == ""){
       alert("Please, enter your City.");
       document.formular.ort.focus();
       return false;
	}
      if(document.formular.email.value == ""){
       alert("Please, enter your E-Mail Address.");
       document.formular.email.focus();
       return false;
	}
      if(document.formular.email.value.indexOf("@") == -1||
	document.formular.email.value.indexOf(".") == -1){
       alert("Please, check your E-Mail-Adresse.");
       document.formular.email.focus();
       return false;
	}
      if(document.formular.nachricht.value == ""){
       alert("Please, enter your Messege.");
       document.formular.nachricht.focus();
       return false;
	}
	  if(document.formular.datenschutz.checked == ""){
       alert("Do you agree with the privacy policy?");
       document.formular.datenschutz.focus();
       return false;
	}

return (true);
}