$(document).ready(function(){
	var currentPosition = 0;
	var slideWidth = 710;
	var slides = $('.slide_quad');
	var numberOfSlides = slides.length;

	// Remove scrollbar in JS
	$('#slidesContainer_quad').css('overflow', 'hidden');

	// Wrap all .slides with #slideInner div
	slides
		.wrapAll('<div id="slideInner_quad"></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_quad').css('width', slideWidth * numberOfSlides);

	// Insert controls in the DOM
	$('#slideshow_quad')
		.prepend('<span class="control_quad" id="leftControl_quad">Clicking moves left</span>')
		.append('<span class="control_quad" id="rightControl_quad">Clicking moves right</span>');

	// Hide left arrow control on first load
	manageControls(currentPosition);

	// Create event listeners for .controls clicks
	$('.control_quad')
	.bind('click', function(){

		// Determine new position
		currentPosition = ($(this).attr('id')=='rightControl_quad') ? currentPosition+1 : currentPosition-1;

		// Hide / show controls
		manageControls(currentPosition);

		// Move slideInner using margin-left
		$('#slideInner_quad').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_quad').hide() } else{ $('#leftControl_quad').show() }

		// Hide right arrow if position is last slide
		if(position==numberOfSlides-1){ $('#rightControl_quad').hide() } else{ $('#rightControl_quad').show() }

	}
});