$(document).ready(function(){
	//global
		$(".c_index #gn_a a img").attr("src","new/images/common_imgs/menu1_ac.gif");
		$(".c_product #gn_b a img").attr("src","../new/images/common_imgs/menu2_ac.gif");
		$(".c_campaign #gn_c a img").attr("src","../new/images/common_imgs/menu3_ac.gif");
	});