/**
 * @package Xslider - A slider plugin for jQuery
 * @version 1.0
 * @author xhowhy <http://x1989.com> 
 **/
;(function($) {
	$.fn.Xslider = function(options) {
		var settings = {
			effect: 'scrollx', //效果  有scrollx|scrolly|fade|none
			speed: 600, //动画速度
			space: 5000, //时间间隔
			auto: true, //自动滚动
			trigger: 'mouseover', //触发事件 注意用mouseover代替hover
			content_box: '.contents', //内容容器id或class
			content_tag: 'li', //内容标签 默认为<li>
			switcher_box: '.switchers', //切换触发器id或class
			switcher_tag: 'li', //切换器标签 默认为<li>
			active_class:'active', //当前切换器样式名称 不含"."
			prev: 'prev', //上一个幅箭头样式名称
			next:'next', //下一个幅箭头样式名称
			/* 
			 *TODO  不倒序滚动
			 *recycle:true,
			*/
			rand:false //是否随机指定默认幻灯页
		};
		settings = $.extend({}, settings, options);
		var index = 1;
		var last_index = 0;
		var $content_box = $(this).find(settings.content_box),$contents = $content_box.find(settings.content_tag);
		var $switcher = $(this).find(settings.switcher_box),$switcher_tag = $switcher.find(settings.switcher_tag);
		if(settings.rand) { index = Math.floor( Math.random()*$contents.length ); slide(); }
		if(settings.effect == 'fade') {
			$.each($contents,function(k, v) {
				(k == 0) ? $(this).css({'position':'absolute','z-index':9}) : $(this).css({'position':'absolute','z-index':1,'opacity':0});
			});
		}
		function slide() {
			if (index >= $contents.length) index = 0;
			$switcher_tag.removeClass(settings.active_class).eq(index).addClass(settings.active_class);
			switch(settings.effect) {
				case 'scrollx':
					$content_box.width($contents.length*$contents.width());
					$content_box.stop().animate({left:-$contents.width()*index},settings.speed);
					break;
				case 'scrolly':
					$contents.css({display:'block'});
					$content_box.stop().animate({top:-$contents.height()*index+'px'},settings.speed);
					break;
				case 'fade':
					$contents.eq(last_index).stop().animate({'opacity': 0}, settings.speed/2).css('z-index',1)
							 .end()
							 .eq(index).css('z-index',9).stop().animate({'opacity': 1}, settings.speed/2)
					break;
				case 'none':
					$contents.hide().eq(index).show();
					break;
			}
			last_index = index;
			index++;
		};
		if(settings.auto) var Timer = setInterval(slide, settings.space);
		$switcher_tag.bind(settings.trigger,function() {
			_pause()
			index = $(this).index();
			slide();
			_continue()
		});
		$(this).find('.arrow').click(function(e) {
			_pause();
			if(!e) e=window.event;
			if(e.target.className == settings.prev) {
				if(!last_index) return;
				index = --last_index;
				slide();
			}
			if(e.target.className == settings.next) {
				slide();
			}
			_continue();
		});
		$content_box.hover(_pause,_continue);
		function _pause() { clearInterval(Timer); }
		function _continue() { if (settings.auto) Timer = setInterval(slide, settings.space); }
	}
})(jQuery);