var regaly = ['1-1', '1-3', '1-4', '1-6', '1-7', '1-9', '2-1', '2-9', '3-3', '3-4', '3-6', '3-7', '4-1', '4-9', '5-1', '5-3', '5-4', '5-6', '5-7', '5-9']

function start(){
    ponumerujPola();
    pokolorujRegaly();
}

function pokolorujRegaly(){
    let x;
    for(x = 0; x < regaly.length; x++){
        document.getElementById(regaly[x]).className = 'regal';
    }
}

function ponumerujPola(){
    let x,y
    for(x = 0; x < 7; x++){
        for(y = 0; y < 11; y++){
            id = x.toString() + "-" + y.toString();
            document.getElementById(id).innerHTML = id;
        }
    }
}