Untitled

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>Tabliczka Mnożenia</title>
    <script type="text/javascript">
    var wiersze = prompt("ile wierszy?");
    var kolumny = prompt("ile kolumn?");
    if(wiersze == " "|| wiersze== null)
        wiersze = 10;
    if(kolumny== " " ||kolumny == null)
        kolumny = 10;
    createTable(wiersze, kolumny);
    function createTable(wiersze, kolumny)
    {
        var j=1;
        var output= "<table border='1' width= '500' cellpadding='5'>";
        for(i=1;i<=wiersze;i++)
            {
                output = output + "<tr>";
                while(j<=kolumny)
                   {

                output = output + "<td>"+ i*j + "</td>";
                j=j+i;
                  }

        output = output + "</tr>";
        j = 1;
     }
        output = output + "</table>";
        document.write(output);
      }

    </script>
</head>
<body>


</body>
</html>