var utskrift;
var userName;
var passWord;
var conPassWord;
window.onload = startUp;
function startUp() {
    document.getElementById("btnCheck").onclick = saveUser;
    utskrift = document.getElementById("lstUserName");
}
function saveUser() {
    userName = document.getElementById("txtUserName").value;
    passWord = document.getElementById("txtPassWord").value;
    conPassWord = document.getElementById("txtConPassWord").value;
    utskrift.innerHTML = ""
    if(userName === "" || passWord === "" ||  passWord.length <5 ||
    conPassWord === "" || passWord !== conPassWord) {
        if(userName === "")
            utskrift.innerHTML +="Du mangler brukernavn" + "<br />";
        if(passWord === "")
            utskrift.innerHTML += "Du mangler passord"  + "<br />";
        if(passWord.length <5)
            utskrift.innerHTML += "Passordet er ikke langt nok"  + "<br />";
        if(conPassWord === "")
            utskrift.innerHTML +="Fyll ut alle feltene"  + "<br />";
        if(passWord !== conPassWord)
            utskrift.innerHTML += "Passordene matcher ikke"  + "<br />";
    }
    else
        utskrift.innerHTML = "Takk for registrering";
}