var navAge = navigator.userAgent
var browserVer = navigator.appVersion.charAt(0);
var myCount = 0;
var roadFlag = 0;
var currentPage = "blank";

if (browserVer >= 3) {
	main_top_1_on = new Image();
	main_top_1_on.src = "../common_img/bu_main_1_g.gif";
	main_top_1_off = new Image();
	main_top_1_off.src = "../common_img/bu_main_1_n.gif";
	//
	main_top_2_on = new Image();
	main_top_2_on.src = "../common_img/bu_main_2_g.gif";
	main_top_2_off = new Image();
	main_top_2_off.src = "../common_img/bu_main_2_n.gif";
	//
	main_top_3_on = new Image();
	main_top_3_on.src = "../common_img/bu_main_3_g.gif";
	main_top_3_off = new Image();
	main_top_3_off.src = "../common_img/bu_main_3_n.gif";
	//
	main_top_4_on = new Image();
	main_top_4_on.src = "../common_img/bu_main_4_g.gif";
	main_top_4_off = new Image();
	main_top_4_off.src = "../common_img/bu_main_4_n.gif";
	//
	main_top_5_on = new Image();
	main_top_5_on.src = "../common_img/bu_main_5_g.gif";
	main_top_5_off = new Image();
	main_top_5_off.src = "../common_img/bu_main_5_n.gif";
	//
}

function actOn(imgName)  {
	if (browserVer >= 3)   {
		onImg = eval(imgName + "_on.src");
		document [imgName].src = onImg;
	}
}

function actOff(imgName)   {
	if (browserVer >= 3) {
		offImg = eval(imgName + "_off.src");
		document [imgName].src = offImg;
	}
}