$(document).ready(function() {
	
		var news = {};
		news['btn_release0'] = 'news/index.html';
		news['btn_release1'] = 'news/ir.html';
		news['btn_release2'] = 'news/event.html';

		// news release tab panel
		$("#releace_area").tabs("#releace_wrap > ul", { effect: 'fade' });
		$("#releace_area > li > a").click(function(){
			$(".active").removeClass("active");
			$(this).addClass("active");
			$(".news_detail").attr('href', news[$(this).attr("id")]);
		});
		
		$("#btn_business0 > img, #btn_business1 > img, #btn_business2 > img, #btn_business3 > img").mouseover(function() {
			$(this).attr("src", $(this).attr("src").replace(/^(.+)(\.[a-z]+)$/, "$1_on$2"));
		}).mouseout(function() {
			$(this).attr("src", $(this).attr("src").replace(/^(.+)_on(\.[a-z]+)$/, "$1$2"));
		
		});

		// preload img
		$.fn.preload = function() {
		    this.each(function(){
		        $('<img />')[0].src = this;
		    });
		};

		$([
			 // common btn
			'common/img/btn_footmenu.gif', 'common/img/btn_header_contact.gif', 'common/img/btn_header_menu.gif', 'common/img/btn_menu.gif', 'common/img/btn_pagetop.gif', 'common/img/img_side_contact.gif', 'common/img/img_side_contact.gif' 
			,
			// index page btn
			'img/btn_business0_on.jpg', 'img/btn_business1_on.jpg', 'img/btn_business2_on.jpg', 'img/btn_business3_on.jpg', 'img/btn_release_0.gif', 'img/btn_release_1.gif', 'img/btn_release_2.gif', 'img/btn_release_0_on.gif', 'img/btn_release_1_on.gif', 'img/btn_release_2_on.gif'
	
		]).preload();
	
});