/*
 * 	Easy Slider - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/3783/jquery-plugin-easy-image-or-content-slider
 *
 *	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
 *	Dual licensed under the MIT (MIT-LICENSE.txt)
 *	and GPL (GPL-LICENSE.txt) licenses.
 *
 *	Built for jQuery library
 *	http://jquery.com
 *
 */
 
/*
 *	markup example for $("#images").easySlider();
 *	
 * 	<div id="images">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */

(function ($) {

    $.fn.easySlider = function (options) {

        // default configuration properties
        var defaults = {
            prevId: 'prevBtn',
            prevText: 'Previous',
            nextId: 'nextBtn',
            nextText: 'Next',
            orientation: '', //  'vertical' is optional;
            speed: 800
        };

        var options = $.extend(defaults, options);

        return this.each(function () {
            obj = $(this);
            var s = $("li", obj).length;
            var w = obj.width();
            var h = obj.height();
            var ts = s - 1;
            var t = 0;
            var vertical = (options.orientation == 'vertical');
            $("ul", obj).css('width', s * w);
            if (!vertical) $("li", obj).css('float', 'left');
            $(obj).before('<span id="' + options.prevId + '"><a href=\"javascript:void(0);\">' + options.prevText + '</a></span> ');
            $(obj).after('<span id="' + options.nextId + '"><a href=\"javascript:void(0);\">' + options.nextText + '</a></span>');
            $("a", "#" + options.prevId).hide();
            $("a", "#" + options.nextId).hide();
            $("a", "#" + options.nextId).click(function () {
                animate("next");
                if (t >= ts) $(this).fadeOut();
                $("a", "#" + options.prevId).fadeIn();
            });
            $("a", "#" + options.prevId).click(function () {
                animate("prev");
                if (t <= 0) $(this).fadeOut();
                $("a", "#" + options.nextId).fadeIn();
            });
            function animate(dir) {
                if (dir == "next") {
                    t = (t >= ts) ? ts : t + 1;
                } else {
                    t = (t <= 0) ? 0 : t - 1;
                };
                if (!vertical) {
                    p = (t * w * -1);
                    $("ul", obj).animate(
						{ marginLeft: p },
						options.speed
					);
                } else {
                    p = (t * h * -1);
                    $("ul", obj).animate(
						{ marginTop: p },
						options.speed
					);
                }
            };
            if (s > 1) $("a", "#" + options.nextId).fadeIn();
        });

    };

})(jQuery);