< div id = "studentsTable" >
< script type = "text/javascript" >
 // zmienne globalne
var names = new Array("Peter", "John", "Amber", "Valen", "Jonathan", "Michael", "Alex", "Caroline", "Kathy", "Dorothy", "Paul", "Jack", "Eve");
var surnames = new Array("Kovalsky", "Smith", "Scott", "Gonzales", "Carter", "Nelson", "Obama", "Stewart", "Diaz", "Hatthew", "Webb", "Stevens");
var studentsNumber = 0;
var table, tabbody;

// generuj tabele poczatkowa
function generate() {

    table = document.createElement("table");
    tabbody = document.createElement("tabbody");
    table.appendChild(tabbody);
    var firstRow = document.createElement("tr");

    var count = document.createElement("td");
    var countText = document.createTextNode("Lp.");
    count.appendChild(countText);

    var name = document.createElement("td");
    var nameText = document.createTextNode("Imię");
    name.appendChild(nameText);

    var surname = document.createElement("td");
    var surnameText = document.createTextNode("Nazwisko");
    surname.appendChild(surnameText);

    firstRow.appendChild(count);
    firstRow.appendChild(name);
    firstRow.appendChild(surname);
    tabbody.appendChild(firstRow);

    var add = document.createElement("input");
    add.type = "button";
    add.value = "Dodaj studenciaka";
    add.onclick = function() {
        addStudent();
    };

    document.getElementById("studentsTable").appendChild(table);
    document.getElementById("studentsTable").appendChild(add);
}

function addStudent() {
    studentsNumber = studentsNumber + 1;

    // nowy wiersz
    var nextRow = document.createElement("tr");

    // komorka z liczba porzadkowa
    var count = document.createElement("td");
    var countNumber = document.createTextNode(studentsNumber);
    count.appendChild(countNumber);

    // komorka z imieniem
    var nextName = document.createElement("td");
    var nextNameText = document.createTextNode(names[Math.floor(Math.random() * names.length)]);
    next.appendChild(nextNameText);

    // komorka z nazwiskiem
    var nextSurname = document.createElement("td");
    var nextSurnameText = document.createTextNode(surnames[Math.floor(Math.random() * surnames.length)]);
    next.appendChild(nextSurnameText);

    nextRow.appendChild(count);
    nextRow.appendChild(nextName);
    nextRow.appendChild(nextSurname);

    document.getElementsByTagName(tabbody).appendChild(nextRow);
    document.getElementsByTagName(table).appendChild(tabbody);
}
< /script>
< /div>