const openArt = function openArticles() {
    var artId = this.id;
    var theURL = 'artshow.jsp?artid=' + artId;
    var winName = 'Artshow';
    var features = 'resizable=yes,width=460,height=750,scrollbars=yes';

    window.open(theURL, null, features);
};

const checkEnterLogin = function checkEnterLogin(evt) {
    if ( evt.keyCode  == 13) {
        checkForm(evt);
    }
}
const checkForm = function checkFormLogin(evt) {
    evt.preventDefault();
    var res = true;
    var felmedd = "";
    var pnr = trim(document.getElementById('pnr').value);
    var intpwd = trim(document.getElementById('intpwd').value);
    var land = "";
    var lang = "";
    var impcountry = "SWE";
    var marke = "";

    if (pnr.length < 3) {
        if (land == impcountry) {
            felmedd = "Ange personnummer med rätt längd!";
        } else if (lang == "sv") {
            felmedd = "Ange identitet!";
        } else if (lang == "fi") {
            felmedd = "Käyttäjätunnus puuttuu!";
        } else {
            felmedd = "Identity is missing!";
        }
        res = false;
        marke = "pnr";
    } else {
        if (intpwd < 1) {
            if (land == impcountry || lang == "sv") {
                felmedd = "Ange internetkod!";
            } else if (lang == "fi") {
                felmedd = "Salasana puuttuu!";
            } else {
                felmedd = "Password is missing!";
            }
            res = false;
            marke = "intpwd";
        }
    }


    if (!res) {
        alert(felmedd);
        document.forms["theForm"].elements[marke].focus();
    } else {
        document.forms["theForm"].op.value = 'login';
        document.forms["theForm"].submit();
    }
}

function showErrorMsg() {
var showAlert = false;

if(showAlert)	{
   var errMess = 'null';
   alert(errMess);
} else if (document.getElementById('errorMsg') && document.getElementById('errorMsg').value.length > 0) {
        alert(document.getElementById('errorMsg').value);
    }
}

window.onload = function () {
    var artLinks = document.getElementsByClassName("artLink");
    Array.from(artLinks).forEach(function (element) {
        element.addEventListener('click', openArt);
    });

    if (document.getElementById('login')) {
        document.getElementById('login').addEventListener('click', checkForm);
    }

    if (document.forms['theForm'] && document.forms['theForm'].intpwd) {

        document.forms['theForm'].intpwd.addEventListener("keydown", checkEnterLogin);
    }


    showErrorMsg()

};