/*
* 	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',
    imageDir: '/about/sites/all/themes/gnowsis/images/',
		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).after('<span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span> <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\" title=\"'+ options.nextText +'\"><img src=\"'+options.imageDir+'arrow3.png\" width=\"97\" border=\"0\" height=\"37\" alt=\"'+ 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);