function color_on(id)
{
    var row = document.getElementById("product_" + id);
    row.style.backgroundColor = "#dddddd";
}

function color_off(id)
{
    var row = document.getElementById("product_" + id);
    row.style.backgroundColor = "#eeeeee";
}

function goToProduct(id, skupina)
{
    location.href = "detail-" + id + ".html?skupina=" + skupina;
}

function goToObj(id)
{
    location.href = "objednavka-" + id + ".html";
}