/*
 * 	Easy Slider 1.5 - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
 *
 *	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 $("#slider").easySlider();
 *	
 * 	<div id="slider">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */
(function($) {
$.fn.easySlider = function(options){
  
// default configuration properties
var defaults = {			
prevId: 		'prevBtn',
prevText: 		'',
nextId: 		'nextBtn',	
nextText: 		'',
controlsShow:	true,
controlsBefore:	'',
controlsAfter:	'',	
controlsFade:	true,
firstId: 		'firstBtn',
firstText: 		'First',
firstShow:		false,
lastId: 		'lastBtn',	
lastText: 		'Last',
lastShow:		false,				
vertical:		false,
speed: 			800,
auto:			false,
pause:			2000,
continuous:		false
}; 
var options = $.extend(defaults, options);  
this.each(function() {  
var obj = $(this); 				
var s = $("li", obj).length;
var w = $("li", obj).width(); 
var h = $("li", obj).height(); 
obj.width(w); 
obj.height(h); 
obj.css("overflow","hidden");
var ts = s-1;
var t = 0;
$("ul", obj).css('width',s*w);			
if(!options.vertical) $("li", obj).css('float','left');
if(options.controlsShow){
var html = options.controlsBefore;
if(options.firstShow) html += '<span id="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';
html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>';
if(options.lastShow) html += ' <span id="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';
html += options.controlsAfter;						
$(obj).after(html);										
};
$("a","#"+options.nextId).click(function(){		
animate("next",true);
});
$("a","#"+options.prevId).click(function(){		
animate("prev",true);				
});	
$("a","#"+options.firstId).click(function(){		
animate("first",true);
});				
$("a","#"+options.lastId).click(function(){		
animate("last",true);				
});		
function animate(dir,clicked){
var ot = t;				
switch(dir){
case "next":
t = (ot>=ts) ? (options.continuous ? 0 : ts) : t+1;						
break; 
case "prev":
t = (t<=0) ? (options.continuous ? ts : 0) : t-1;
break; 
case "first":
t = 0;
break; 
case "last":
t = ts;
break; 
default:
break; 
};	
var diff = Math.abs(ot-t);
var speed = diff*options.speed;						
if(!options.vertical) {
p = (t*w*-1);
$("ul",obj).animate(
{ marginLeft: p }, 
speed
);				
} else {
p = (t*h*-1);
$("ul",obj).animate(
{ marginTop: p }, 
speed
);					
};
if(!options.continuous && options.controlsFade){					
if(t==ts){
$("a","#"+options.nextId).hide();
$("a","#"+options.lastId).hide();
} else {
$("a","#"+options.nextId).show();
$("a","#"+options.lastId).show();					
};
if(t==0){
$("a","#"+options.prevId).hide();
$("a","#"+options.firstId).hide();
} else {
$("a","#"+options.prevId).show();
$("a","#"+options.firstId).show();
};					
};				
if(clicked) clearTimeout(timeout);
if(options.auto && dir=="next" && !clicked){;
timeout = setTimeout(function(){
animate("next",false);
},diff*options.speed+options.pause);
};
};
// init
var timeout;
if(options.auto){;
timeout = setTimeout(function(){
animate("next",false);
},options.pause);
};		
if(!options.continuous && options.controlsFade){					
$("a","#"+options.prevId).hide();
$("a","#"+options.firstId).hide();				
};				
});
  
};
})(jQuery);