function validator() {
if (!document.getElementById("account-register")) { return false; }
var form = document.getElementById("account-register");

form.onsubmit = function() {
var errors = 0;
$('#account-register li.error span').remove();
$("li").removeClass("error");

var firstname = document.getElementById("firstname");
if(firstname.value === '') {
errors[errors++]
$(firstname.parentNode).addClass("error").append('<span>Vorname fehlt</span>');
}

var lastname = document.getElementById("lastname");
if(lastname.value === '') {
errors[errors++]
$(lastname.parentNode).addClass("error").append('<span>Nachname fehlt</span>');
}

var city = document.getElementById("city");
if(city.value === '') {
errors[errors++]
$(city.parentNode).addClass("error").append('<span>Stadt fehlt</span>');
}

var address = document.getElementById("address");
if(address.value === '') {
errors[errors++]
$(address.parentNode).addClass("error").append('<span>Addresse fehlt</span>');
}

var postcode = document.getElementById("postcode");
if(postcode.value === '') {
errors[errors++]
$(postcode.parentNode).addClass("error").append('<span>PLZ fehlt</span>');
}

var email = document.getElementById("email");
if(email.value === '') {
errors[errors++]
$(email.parentNode).addClass("error").append('<span>E-Mail fehlt</span>');
} else {
if (!validEmail(email.value)){
errors[errors++]
$(email.parentNode).addClass("error").append('<span>Sie haben eine falsche E-Mail Adresse eingegeben</span>');
}
}

var phone = document.getElementById("phone");
if(phone.value === '') {
errors[errors++]
$(phone.parentNode).addClass("error").append('<span>Telefonnummer fehlt</span>');
}

var password = document.getElementById("password");
if(password.value === '') {
errors[errors++]
$(password.parentNode).addClass("error").append('<span>Sie haben kein Passwort eingegeben</span>');
}

var passwordconfirm = document.getElementById("passwordconfirm");
if(passwordconfirm.value === '') {
errors[errors++]
$(passwordconfirm.parentNode).addClass("error").append('<span>Sie haben kein Passwort eingegeben</span>');
} else {
if (passwordconfirm.value != password.value){
errors[errors++]
$(passwordconfirm.parentNode).addClass("error").append('<span>Passw&ouml;rter stimmen nicht &uuml;berein</span>');
} else {
if(passwordconfirm.value.length < 5){
errors[errors++]
$(passwordconfirm.parentNode).addClass("error").append('<span>Passwort muss mindestens 5 Zeichen lang sein</span>');
}
}
}



if (errors != 0) {
return false;
}
}
}

$(document).ready(function(){
validator();
});