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jQuery.fn.bxSlider = function(options){
var defaults = {
mode: 'slide',
speed: 500,
auto: false,
auto_direction: 'left',
pause: 2500,
controls: true,
prev_text: 'prev',
next_text: 'next',
width: $(this).children().width(),
prev_img: '',
next_img: '',
ticker_direction: 'left',
wrapper_class: 'container'
};
options = $.extend(defaults, options);
if(options.mode == 'ticker'){
options.auto = true;
}
var $this = $(this);
var $parent_width = options.width;	
var current = 0;
var is_working = false;
var child_count = $this.children().size();
var i = 0;
var j = 0;
var k = 0;
function animate_next(){
is_working = true;
$this.animate({'left':'-' + $parent_width * 2 + 'px'}, options.speed, function(){
$this.css({'left':'-' + $parent_width + 'px'}).children(':first').appendTo($this);
is_working = false;
});		
}
function animate_prev(){
is_working = true;
$this.animate({'left': 0}, options.speed, function(){
$this.css({'left':'-' + $parent_width + 'px'}).children(':last').insertBefore($this.children(':first'));
is_working = false;
});				
}
function fade(direction){
if(direction == 'next'){
var last_before_switch = child_count - 1;
var start_over = 0;
var incr = k + 1;
}else if(direction == 'prev'){
var last_before_switch = 0;
var start_over = child_count -1;
var incr = k - 1;
}		
is_working = true;
if(k == last_before_switch){
$this.children().eq(k).fadeTo(options.speed, 0);
$this.children().eq(start_over).fadeTo(options.speed, 1, function(){
is_working = false;
k = start_over;
});
}else{
$this.children().eq(k).fadeTo(options.speed, 0);
$this.children().eq(incr).fadeTo(options.speed, 1, function(){
is_working = false;
k = incr;
});
}		
}
function add_controls(){
if(options.prev_img != '' || options.next_img != ''){
$this.parent().append('<a class="slider_prev" href=""><img src="' + options.prev_img + '" alt=""/></a><a class="slider_next" href=""><img src="' + options.next_img + '" alt="" /></a>');
}else{
$this.parent().append('<a class="slider_prev" href="">' + options.prev_text + '</a><a class="slider_next" href="">' + options.next_text + '</a>');
}
$this.parent().find('.slider_prev').css({'float':'left', 'outline':'0'});
$this.parent().find('.slider_next').css({'float':'right', 'outline':'0'});
if(options.mode == 'fade'){
$this.parent().find('.slider_prev').css({'paddingTop' : $this.children().height()})
$this.parent().find('.slider_next').css({'paddingTop' : $this.children().height()})
}		

$this.parent().find('.slider_next').click(function(){		
if(!is_working){
if(options.mode == 'slide'){
animate_next();
if(options.auto){
clearInterval($.t);
$.t = setInterval(function(){animate_next();}, options.pause);
}
}else if(options.mode == 'fade'){
fade('next');
if(options.auto){
clearInterval($.t);
$.t = setInterval(function(){fade('next');}, options.pause);
}

}
}
return false;
});	
$this.parent().find('.slider_prev').click(function(){	
if(!is_working){
if(options.mode == 'slide'){
animate_prev();
if(options.auto){
clearInterval($.t);
$.t = setInterval(function(){animate_prev();}, options.pause);
}
}else if(options.mode == 'fade'){
fade('prev');
if(options.auto){
clearInterval($.t);
$.t = setInterval(function(){fade('prev');}, options.pause);
}
}
}
return false;
});	
}

function ticker() {
if(options.ticker_direction == 'left'){
$this.animate({'left':'-' + $parent_width * 2 + 'px'}, options.speed, 'linear', function(){
$this.css({'left':'-' + $parent_width + 'px'}).children(':first').appendTo($this);
ticker();
});		
}else if(options.ticker_direction == 'right'){
$this.animate({'left': 0}, options.speed, 'linear', function(){
$this.css({'left':'-' + $parent_width + 'px'}).children(':last').insertBefore($this.children(':first'));
ticker();
});				
}		
}

$this.wrap('<div class="' + options.wrapper_class + '"></div>');
//console.log($this.parent().css('paddingTop'));
if(options.mode == 'slide' || options.mode == 'ticker'){
$this.parent().css({
'overflow' : 'hidden',
'position' : 'relative',
'width' : options.width + 'px'
});
$this.css({		
'width' : '999999px',
'position' : 'relative',
'left' : '-' + $parent_width + 'px'		
});
$this.children().css({		
'float' : 'left',
'width' : $parent_width
});
$this.children(':last').insertBefore($this.children(':first'));
}else if(options.mode == 'fade'){
$this.parent().css({
'overflow' : 'hidden',
'position' : 'relative',
'width' : options.width + 'px'
//'height' : $this.children().height()
});
if(!options.controls){		
$this.parent().css({'height' : $this.children().height()});		
}
$this.children().css({		
'position' : 'absolute',
'width' : $parent_width,
'listStyle' : 'none',
'opacity' : 0		
});
$this.children(':first').css({
'opacity' : 1
});
}
if(!options.auto){
add_controls();
}else{
if(options.mode == 'ticker'){
ticker();
}else{

if(options.mode == 'slide'){
if(options.auto_direction == 'left'){
$.t = setInterval(function(){animate_next();}, options.pause);		
}else if(options.auto_direction == 'right'){
$.t = setInterval(function(){animate_prev();}, options.pause);
}
}else if(options.mode == 'fade'){
if(options.auto_direction == 'left'){
$.t = setInterval(function(){fade('next');}, options.pause);
}else if(options.auto_direction == 'right'){
$.t = setInterval(function(){fade('prev');}, options.pause);
}
}
if(options.controls){
add_controls();
}
}
}
}