if (document.images) {	

	main_menu1_on = new Image();				main_menu1_on.src="images/navigation/main1b.gif";  
	main_menu1_off = new Image(); 				main_menu1_off.src="images/navigation/main1a.gif";  
	main_menu1_select = new Image(); 			main_menu1_select.src="images/navigation/main1c.gif";  
	
   	main_menu2_on = new Image();				main_menu2_on.src="images/navigation/main2b.gif";  
	main_menu2_off = new Image(); 				main_menu2_off.src="images/navigation/main2a.gif";  
	main_menu2_select = new Image(); 			main_menu2_select.src="images/navigation/main2c.gif";  
	
   	main_menu3_on = new Image();				main_menu3_on.src="images/navigation/main3b.gif";  
	main_menu3_off = new Image(); 				main_menu3_off.src="images/navigation/main3a.gif";  
	main_menu3_select = new Image(); 			main_menu3_select.src="images/navigation/main3c.gif";  
	
   	main_menu4_on = new Image();				main_menu4_on.src="images/navigation/main4b.gif";  
	main_menu4_off = new Image(); 				main_menu4_off.src="images/navigation/main4a.gif";  
	main_menu4_select = new Image(); 			main_menu4_select.src="images/navigation/main4c.gif";  
	
   	main_menu5_on = new Image();				main_menu5_on.src="images/navigation/main5b.gif";  
	main_menu5_off = new Image();		 		main_menu5_off.src="images/navigation/main5a.gif";  
	main_menu5_select = new Image(); 			main_menu5_select.src="images/navigation/main5c.gif";  
	
	main_menu_tile = new Image();				main_menu_tile.src="images/background/main_tile.gif";
	sub_menu_tile = new Image();				sub_menu_tile.src="images/background/sub_tile.gif";
	
}