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/**
 * Created by Jaroslaw on 2/21/2017.
 */

var cors = document.getElementById("courses"),
    durn = document.getElementById("duration"),
    langs = document.getElementById("languages"),
    rept = document.getElementById("reporting");
var nameUser = document.getElementById("userName"),
    surnameUser = document.getElementById("userSurname");
var scost;

window.onload = function () {
    countAll(parseInt(cors.options[cors.selectedIndex].value),
        parseInt(durn.options[durn.selectedIndex].value),
        parseInt(langs.options[langs.selectedIndex].value),
        parseInt(rept.options[rept.selectedIndex].value));
};

function countAll(c, d, l, r) {
    var sumaCost;
    sumaCost = d * c + l + r;
    scost = sumaCost;

    document.getElementById("costSingle").innerHTML = c;
    document.getElementById("costAll").innerHTML = sumaCost;
}

function coursesCount() {
    countAll(parseInt(cors.options[cors.selectedIndex].value),
        parseInt(durn.options[durn.selectedIndex].value),
        parseInt(langs.options[langs.selectedIndex].value),
        parseInt(rept.options[rept.selectedIndex].value));
}

function getCourse() {
    if (nameUser.value !== "" && surnameUser.value !== "")
        alert("Great! " + nameUser.value + " you get the course - " + cors.options[cors.selectedIndex].text + "! And total cost is - " + scost + " $");
}