/*
 * yuga.js 0.6.3 - 優雅なWeb制作のためのJS
 *
 * Copyright (c) 2007 Kyosuke Nakamura (kyosuke.jp)
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 *
 * Since:     2006-10-30
 * Modified:  2008-07-07
 *
 * jQuery 1.2.6
 * ThickBox 3.1
 */

(function($) {

	$(function() {
		$.yuga.rollover();
	});

	//---------------------------------------------------------------------

	$.yuga = {
		//ロールオーバー
		rollover: function(options) {
			var c = $.extend({
				hoverSelector: '.btn, .allbtn img',
				groupSelector: '.btngroup',
				postfix: '_on'
			}, options);
			//ロールオーバーするノードの初期化
			$(c.hoverSelector).filter(isNotCurrent).each(function(){
				this.originalSrc = $(this).attr('src');
				this.rolloverSrc = this.originalSrc.replace(/(\.gif|\.jpg|\.png)$/, c.postfix+"$1");
				this.rolloverImg = new Image;
				this.rolloverImg.src = this.rolloverSrc;
			});
			//グループ内のimg要素を指定するセレクタ生成
			var inGroup = new Array();
			$.each(c.groupSelector.split(/,\s?/g), function(i, n){
				inGroup.push(n + ' ' + c.hoverSelector.replace(/,\s?/g, ', '+ n +' '));
			});
			var inGroupSelector = $(inGroup.join(', '));
			//通常ロールオーバー
			$(c.hoverSelector).not(inGroupSelector).filter(isNotCurrent).hover(function(){
				$(this).attr('src',this.rolloverSrc);
			},function(){
				$(this).attr('src',this.originalSrc);
			});
			//グループ化されたロールオーバー
			$(c.groupSelector).hover(function(){
				$(this).find('img').filter(c.hoverSelector).filter(isNotCurrent).each(function(){
					$(this).attr('src',this.rolloverSrc);
				});
			},function(){
				$(this).find('img').filter(c.hoverSelector).filter(isNotCurrent).each(function(){
					$(this).attr('src',this.originalSrc);
				});
			});
			//フィルタ用function
			function isNotCurrent(i){
				return Boolean(!this.currentSrc);
			}
		}
	};
})(jQuery);