/*
 *     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
 *
 */

(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() {
            var 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).after('<span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span> <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);