/*

	----------------------------------------------------------------------------------------------------
	Accessible News Slider
	----------------------------------------------------------------------------------------------------

	Author:
	Brian Reindel

	Author URL:
	http://blog.reindel.com

	License:
	Unrestricted. This script is free for both personal and commercial use.

*/

jQuery.fn.accessNews = function( settings ) {
    settings = jQuery.extend({
        speed    : "normal",
        slideBy  : 2,
        position : "left"
    }, settings);
    return this.each(function() {
        jQuery.fn.accessNews.run( jQuery( this ), settings );
    });
};
jQuery.fn.accessNews.run = function( $this, settings ) {
    var ul = jQuery( "ul:eq(0)", $this );
    var li = ul.children();
    if ( li.length >= settings.slideBy ) {
        
        var $next = jQuery( ".next > a", $this );
        var $back = jQuery( ".back > a", $this );
        if(li.length == settings.slideBy){
            $next.hide();
            $back.hide();
        }
            
        var liWidth = jQuery( li[0] ).width();
        var animating = false;
        ul.css( "width", ( li.length * liWidth ) );
        ul.css(settings.position,"0px");
        $next.click(function() {
            if ( !animating ) {
                animating = true;
                offsetLeft = parseInt( ul.css(settings.position)) - ( liWidth * settings.slideBy );

                if ( offsetLeft + ul.width() > 0 ) {
                    $back.css( "display", "block" );

                    if(settings.position=='right'){
                        ul.animate({
                            right:offsetLeft
                        },settings.speed,function() {
                            if ( parseInt( ul.css(settings.position)) + ul.width() <= liWidth * settings.slideBy ) {
                                $next.css( "display", "none" );
                            }
                            animating = false;
                        });
                    }
                    else{
                        ul.animate({
                            left:offsetLeft
                        },settings.speed,function() {
                            if ( parseInt( ul.css(settings.position)) + ul.width() <= liWidth * settings.slideBy ) {
                                $next.css( "display", "none" );
                            }
                            animating = false;
                        });
                    }


                } else {
                    animating = false;
                }
            }
            return false;
        });
        $back.click(function() {
            if ( !animating ) {
                animating = true;
                offsetRight = parseInt( ul.css(settings.position) ) + ( liWidth * settings.slideBy );
                if ( offsetRight + ul.width() <= ul.width() ) {
                    $next.css( "display", "block" );
                    if(settings.position=='right'){
                        ul.animate({
                            right: offsetRight
                        }, settings.speed, function() {
                            if ( parseInt( ul.css(settings.position) ) == 0 ) {
                                $back.css( "display", "none" );
                            }
                            animating = false;
                        });
                    }
                    else{
                        ul.animate({
                            left: offsetRight
                        }, settings.speed, function() {
                            if ( parseInt( ul.css(settings.position) ) == 0 ) {
                                $back.css( "display", "none" );
                            }
                            animating = false;
                        });
                    }

                } else {
                    animating = false;
                }
            }
            return false;
        });
    }
};