$(document).ready(function(){
    $('#imp-prev-slide').click(function(){
        prevSlideImp()
        return false;
    });
                
    $('#imp-next-slide').click(function(){
        nextSlideImp()
        return false;
    });
});

function nextSlideImp(){
    var questionCurent = parseInt($('#slideCurent').val());
    var questionNumber = questionCurent + 1;
    slideQuestion(questionNumber);
}

function prevSlideImp(){
    var questionCurent = parseInt($('#slideCurent').val());
    var questionNumber = questionCurent - 1;
    slideQuestion(questionNumber);
}

function slideQuestion(questionNumber){
    var questionCount = parseInt($('#slideCount').val());
    
    if ((questionNumber + 1) > questionCount){
        questionNumber = 0;
    }
    
    if (questionNumber < 0 ){
        questionNumber = questionCount - 1;
    }
    
    
    var questionBoxWidth = parseInt($('.imp-slide:first').css('width'));
    var questionRibbonMarginVal = questionBoxWidth * questionNumber * -1;
    var questionRibbonMargin = questionRibbonMarginVal + 'px';
    // alert(questionRibbonMargin);
    $('#imp-slider-ribbon').animate({
        'margin-left': questionRibbonMargin
    }, 450);
           
    $('#slideCurent').val(questionNumber);
    
}