$(document).ready(function() {
    var currentPosition = 0;
    var slideWidth = 865;
    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,
	        'display': "block"
	    });

    // 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"></span>')
    //Clicking moves left
        .append('<span class="control" id="rightControl"></span>');
    //Clicking moves right

    // 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() }
    }
});