$(document).ready(function () {
    $('a[id*=lnkService]').click(function () {
        var id = $(this).siblings('input[id=hdServiceId]').val();

        if (id == 4) {
            window.location.href = "http://www.otvsystems.co.uk/iPad/iPad.aspx";
        }
        showLayer(id);
        return false;
    });
});

function showLayer(id) {
    var divId = "pnlServices";

    $('div[id*=' + divId + ']').each(function () {
        $(this).removeClass('active');
    });

    divId = divId + id;
    $('div[id*=' + divId + ']').addClass("active");
}