/*
 *  SliderNav - A Simple Content Slider with a Navigation Bar
 *  Copyright 2010 Monjurul Dolon, http://mdolon.com/
 *  Released under the MIT, BSD, and GPL Licenses.
 *  More information: http://devgrow.com/slidernav
 */
$.fn.sliderNav = function(options) {
	var defaults = { items: ["1998","1999","2000","2001","2002","2003","2004","2005","2006","2007","2008","2009","2010","2011"], debug: false, height: null};
	var opts = $.extend(defaults, options); var o = $.meta ? $.extend({}, opts, $$.data()) : opts; var slider = $(this); $(slider).addClass('slider');
	$('.slider-content li:first', slider).addClass('selected');
	$(slider).append('<div class="slider-nav"><ul></ul></div>');
	for(var i in o.items) $('.slider-nav ul', slider).append("<li><a alt='#"+o.items[i]+"'>"+o.items[i]+"</a></li>");
	var height = $('.slider-nav', slider).height();
	if(o.height) height = o.height;
	$('.slider-content, .slider-nav', slider).css('height',height);
	if(o.debug) $(slider).append('<div id="debug">Scroll Offset: <span>0</span></div>');
	$('.slider-nav a', slider).mouseover(function(event){
		var target = $(this).attr('alt');
		var cOffset = $('.slider-content', slider).offset().top;
		var tOffset = $('.slider-content '+target, slider).offset().top;
		var height = $('.slider-nav', slider).height(); if(o.height) height = o.height;
		var pScroll = (tOffset - cOffset) - height/8;
		$('.slider-content li', slider).removeClass('selected');
		$(target).addClass('selected');
		$('.slider-content', slider).stop().animate({scrollTop: '+=' + pScroll + 'px'});
		if(o.debug) $('#debug span', slider).html(tOffset);
	});
};