button_hu_main1= new Image(); 
button_hu_main1.src="img/button_hu_main1.gif"; 
button_hu_main2= new Image(); 
button_hu_main2.src="img/button_hu_main2.gif";

button_en_main1= new Image(); 
button_en_main1.src="img/button_en_main1.gif"; 
button_en_main2= new Image(); 
button_en_main2.src="img/button_en_main2.gif";

function Normal(imgname)
{
	document[imgname].src=eval(imgname+"1.src");
	window.status='';   
	return true;
}
function Anim(imgname)
{
	document[imgname].src=eval(imgname+"2.src");
	window.status='Open';
	return true;
}