//=================================================

if (document.images){

	bt1_a = new Image;
	bt1_b = new Image;
	bt2_a = new Image;
	bt2_b = new Image;
	bt3_a = new Image;
	bt3_b = new Image;
	bt4_a = new Image;
	bt4_b = new Image;
	bt5_a = new Image;
	bt5_b = new Image;
	
	bt1_a.src = "img/menu_beer_a.gif";
	bt1_b.src = "img/menu_beer_b.gif";
	bt2_a.src = "img/menu_restaurant_a.gif";
	bt2_b.src = "img/menu_restaurant_b.gif";
	bt3_a.src = "img/menu_shopping_a.gif";
	bt3_b.src = "img/menu_shopping_b.gif";
	bt4_a.src = "img/menu_info_a.gif";
	bt4_b.src = "img/menu_info_b.gif";
	bt5_a.src = "img/menu_about_a.gif";
	bt5_b.src = "img/menu_about_b.gif";

}else{

	bt1_a = "";
	bt1_b = "";
	bt2_a = "";
	bt2_b = "";
	bt3_a = "";
	bt3_b = "";
	bt4_a = "";
	bt4_b = "";
	bt5_a = "";
	bt5_b = "";
	
	document.bt1 = "";
	document.bt2 = "";
	document.bt3 = "";
	document.bt4 = "";
	document.bt5 = "";

}