(function($) {

$.effects.slide = function(o) {

	return this.queue(function() {

		var el = $(this), props = ['position','top','left'];

		var mode = $.effects.setMode(el, o.options.mode || 'show'); 
		var direction = o.options.direction || 'left'; 

		$.effects.save(el, props); el.show(); 
		$.effects.createWrapper(el).css({overflow:'hidden'}); 
		var ref = (direction == 'up' || direction == 'down') ? 'top' : 'left';
		var motion = (direction == 'up' || direction == 'left') ? 'pos' : 'neg';
		var distance = o.options.distance || (ref == 'top' ? el.outerHeight({margin:true}) : el.outerWidth({margin:true}));
		if (mode == 'show') el.css(ref, motion == 'pos' ? -distance : distance); 

		var animation = {};
		animation[ref] = (mode == 'show' ? (motion == 'pos' ? '+=' : '-=') : (motion == 'pos' ? '-=' : '+=')) + distance;

		el.animate(animation, { queue: false, duration: o.duration, easing: o.options.easing, complete: function() {
			if(mode == 'hide') el.hide(); 
			$.effects.restore(el, props); $.effects.removeWrapper(el); 
			if(o.callback) o.callback.apply(this, arguments); 
			el.dequeue();
		}});

	});
};
})(jQuery);