(function($) {
	
	$.fn.jwTabs = function(options) {

		var options = $.extend({
			fade : true,
			tabTitleReference : null,
			interval : null,
			startTab : 1,
			tabContainerName : 'tab-items'
		}, options);
	
		return this.each(function() {			
		
			var $this = $(this),
				divCount = $this.children('div').length,
				tabContainer = '<ul id="' + options.tabContainerName + '">';

				$this
					.children('div:not(:nth-child(' + options.startTab + '))')
					.hide()
					.end()
					.hover(function() {
						$this.addClass('hovered');
					}, function() {
						$this.removeClass('hovered');
					});						
				
				for (var i = 1; i <= divCount; i++) {
					if( options.tabTitleReference ) {
						var heading = $this
										.children('div:nth-child(' + i + ')')
										.find(options.tabTitleReference)
										.filter(':first')
										.text();
												
						if( heading !== '' ) tabContainer += '<li><a href="#" rel="' + i + '">' + heading + '</a></li>';
						else tabContainer += '<li><a href="#" rel="' + i + '">' + i + '</a></li>';
					}
					else tabContainer += '<li><a href="#" rel="' + i + '">' + i + '</a></li>';
				};
				tabContainer += '</ul>';
				$this.prepend(tabContainer);
				
				var $container = $('#' + options.tabContainerName);
				
				$container
					.find('li:nth-child(' + options.startTab + ')')
						.addClass('tab-selected')
					.end()
					.find('a')
						.click(function() {
							var $a = $(this);
							
							var num = $a.attr('rel');
							if( $this
									.children('div')
									.eq(num - 1)
									.is(':visible')
							) return false; // user is already on selected tab
														
							$container
								.find('li.tab-selected')
								.removeClass('tab-selected');

							$a.parent().addClass('tab-selected');
					
							if( options.fade ) {
								$this
									.children('div')
									.hide()
									.eq(num - 1)
									.fadeIn(options.fade);
							}
					
							else { 
								$this
									.children('div')
									.hide()
									.eq(num -1)
									.show();
							}

							return false;
						});	
				
				// auto change tabs				
				if( options.interval ) {
					var i = options.startTab;
				
					setInterval(function() {
						
						if( !$this.hasClass('hovered') ) {
							$container
								.find('a')
								.eq(i)
								.trigger('click');
							i++;
							if( i === divCount ) i = 0;
						}
						
					}, options.interval);
 				}			

		}); // end each
	
	}
	
})(jQuery);