function hide_contents(){
	document.getElementById('flash').style.display = "none"
	document.getElementById('cm002').style.display = "none";
	document.getElementById('cm003').style.display = "none";
	document.getElementById('cm004').style.display = "none";
	
	document.getElementById('cm001').style.display = "block";
	document.getElementById('cm001_bt').src = "images/main_menu_01_on.gif";
}

function show_contents(select){

	document.getElementById('flash').style.display = "none";
	document.getElementById('cm001').style.display = "none";
	document.getElementById('cm002').style.display = "none";
	document.getElementById('cm003').style.display = "none";
	document.getElementById('cm004').style.display = "none";
	
	document.getElementById(select).style.display = "block";
	
	clearInterval(tid);
	
}

function map(id){
	var img = document.getElementById("mapimage");  
	img.src="./images/map/" + id + ".jpg";
}

function show_main03(id){
	var img = document.getElementById("main_03");
	switch(id){
		case 1:
			img.src="./images/main_03_01.jpg";
			break;
		case 2:
			img.src="./images/main_03_02.jpg";
			break;
		default:
			img.src="./images/main_03.jpg";
			break;
	}
	
}

function show_main(id,which){
	
	var img = document.getElementById("main_" + id);
	
	if(which){
		img.src = "./images/main_" + id + ".jpg";
	}else{
		img.src = "./images/main_" + id + "_on.jpg";
	}
	
}

function startup(){
	
	var c1 = document.getElementById('cm001');
	var c2 = document.getElementById('cm002');
	var c3 = document.getElementById('cm003');
	var c4 = document.getElementById('cm004');
	var b1 = document.getElementById('cm001_bt');
	var b2 = document.getElementById('cm002_bt');
	var b3 = document.getElementById('cm003_bt');
	var b4 = document.getElementById('cm004_bt');
	var flash = document.getElementById('flash');
	
	if(flash.style.display =="block"){
		flash.style.display = "none";
		c1.style.display = "block";
		b1.src = "images/main_menu_01_on.gif";
	}else if(c1.style.display == "block"){
		c1.style.display = "none";
		b1.src = "images/main_menu_01_n.gif";
		c2.style.display = "block";
		b2.src = "images/main_menu_02_on.gif";
	}else if(c2.style.display == "block"){
		c2.style.display = "none";
		b2.src = "images/main_menu_02_n.gif";
		c3.style.display = "block";	
		b3.src = "images/main_menu_03_on.gif";
	}else if(c3.style.display == "block"){
		c3.style.display = "none";
		b3.src = "images/main_menu_03_n.gif";
		c4.style.display = "block";	
		b4.src = "images/main_menu_04_on.gif";
	}else if(c4.style.display == "block"){
		c4.style.display = "none";
		b4.src = "images/main_menu_04_n.gif";
		flash.style.display = "block";
		clearInterval(tid);
	}
	
}