$(document).ready(function(){
	//global
		$(".c_about #gb_nav .a a img").attr("src","../images/common_imgs/gb_nav_01_ac.png");
		$(".c_service #gb_nav .b a img").attr("src","../images/common_imgs/gb_nav_02_ac.png");
		$(".c_company #gb_nav .c a img").attr("src","../images/common_imgs/gb_nav_03_ac.png");
		$(".c_recruit #gb_nav .d a img").attr("src","../images/common_imgs/gb_nav_04_ac.png");
		$(".c_contact #gb_nav .e a img").attr("src","../images/common_imgs/gb_nav_05_ac.png");
	});