$(document).ready(function(){
    var currentPosition = 0;
    var slideWidth = 939;
    var slides = $('.slide');
    var numberOfSlides = slides.length;
    // Remove scrollbar in JS
    $('#slidesContainer').css('overflow', 'hidden');
    // Wrap all .slides with #slideInner div
    slides.wrapAll('<div id="slideInner"></div>')
    // Float left to display horizontally, readjust .slides width
    .css({
        'float' : 'left',
        'width' : slideWidth
    });
    // Set #slideInner width equal to total width of all slides
    $('#slideInner').css('width', slideWidth * numberOfSlides);
    // Insert controls in the DOM
    $('#slideshow').prepend('<span class="control" id="leftControl">Clicking moves left</span>').append('<span class="control" id="rightControl">Clicking moves right</span>');
    // Hide left arrow control on first load
    manageControls(currentPosition);
    // Create event listeners for .controls clicks
    $('.control').bind('click', function(){
        // Determine new position
        currentPosition = ($(this).attr('id')=='rightControl') ? currentPosition+1 : currentPosition-1;
        // Hide / show controls
        manageControls(currentPosition);
        // Move slideInner using margin-left
        $('#slideInner').animate({
            'marginLeft' : slideWidth*(-currentPosition)
        });
    });
    // manageControls: Hides and Shows controls depending on currentPosition
    function manageControls(position){
        // Hide left arrow if position is first slide
        if(position==0){
            $('#leftControl').hide()
        } else{
            $('#leftControl').show()
        }
        // Hide right arrow if position is last slide
        if(position==numberOfSlides-1){
            $('#rightControl').hide()
        } else{
            $('#rightControl').show()
        }
    }
});