var isCtrl = false;
document.onkeyup = function (e) {
    if (e.which == 17) isCtrl = false;
}
document.onkeydown = function (e) {
    if (e.which == 17) isCtrl = true;
    if (e.which == 76 && isCtrl == true) {
        //run code for CTRL+l -- ie, save!
        hideshow(document.getElementById('login'))
        return false;
    }
    if (e.which == 79 && isCtrl == true) {
        //run code for CTRL+O -- ie, open!
        return false;
    }
    if (e.which == 84 && isCtrl == true) {
        //run code for CTRL+T -- ie, new tab!
        return false;
    }
}

function hideshow(which) {
    if (!document.getElementById)
        return
    if (which.style.display == "block")
        which.style.display = "none"
    else
        which.style.display = "block"
}