var currentSlide = 1;
var maxSlide = 0;

function initSlide() {
    maxSlide = $('#slider ul').length;
    $("#slider").find("ul:gt(0)").hide();
}
function nextSlide() {
    if (currentSlide < maxSlide) {
        $('#slide' + currentSlide).hide();
        currentSlide = currentSlide + 1;
        $('#slide' + currentSlide).show();
        
        $('#current-slide').text(currentSlide);
    }

}

function prevSlide() {
    if (currentSlide > 1) {
        $('#slide' + currentSlide).hide();
        currentSlide = currentSlide - 1;
        $('#slide' + currentSlide).show();

        $('#current-slide').text(currentSlide);
    }

}