var ladattu = false;
 
function preload(){
	if (document.images) {
		fi_nav_1a = new Image();
		fi_nav_1a.src = "images/fi/navigation/1_a.gif";
		fi_nav_1b = new Image();
		fi_nav_1b.src = "images/fi/navigation/1_b.gif";
		fi_nav_2a = new Image();
		fi_nav_2a.src = "images/fi/navigation/2_a.gif";
		fi_nav_2b = new Image();
		fi_nav_2b.src = "images/fi/navigation/2_b.gif";	
		fi_nav_3a = new Image();
		fi_nav_3a.src = "images/fi/navigation/3_a.gif";
		fi_nav_3b = new Image();
		fi_nav_3b.src = "images/fi/navigation/3_b.gif";	
		fi_nav_4a = new Image();
		fi_nav_4a.src = "images/fi/navigation/4_a.gif";
		fi_nav_4b = new Image();
		fi_nav_4b.src = "images/fi/navigation/4_b.gif";	
		fi_nav_5a = new Image();
		fi_nav_5a.src = "images/fi/navigation/5_a.gif";
		fi_nav_5b = new Image();
		fi_nav_5b.src = "images/fi/navigation/5_b.gif";	
		fi_nav_6a = new Image();
		fi_nav_6a.src = "images/fi/navigation/6_a.gif";
		fi_nav_6b = new Image();
		fi_nav_6b.src = "images/fi/navigation/6_b.gif";	
		fi_nav_7a = new Image();
		fi_nav_7a.src = "images/fi/navigation/7_a.gif";
		fi_nav_7b = new Image();
		fi_nav_7b.src = "images/fi/navigation/7_b.gif";	
		fi_nav_8a = new Image();
		fi_nav_8a.src = "images/fi/navigation/8_a.gif";
		fi_nav_8b = new Image();
		fi_nav_8b.src = "images/fi/navigation/8_b.gif";
		
		// English
		
		en_nav_1a = new Image();
		en_nav_1a.src = "images/en/navigation/1_a.gif";
		en_nav_1b = new Image();
		en_nav_1b.src = "images/en/navigation/1_b.gif";
		en_nav_2a = new Image();
		en_nav_2a.src = "images/en/navigation/2_a.gif";
		en_nav_2b = new Image();
		en_nav_2b.src = "images/en/navigation/2_b.gif";	
		en_nav_3a = new Image();
		en_nav_3a.src = "images/en/navigation/3_a.gif";
		en_nav_3b = new Image();
		en_nav_3b.src = "images/en/navigation/3_b.gif";	
		en_nav_4a = new Image();
		en_nav_4a.src = "images/en/navigation/4_a.gif";
		en_nav_4b = new Image();
		en_nav_4b.src = "images/en/navigation/4_b.gif";	
		en_nav_5a = new Image();
		en_nav_5a.src = "images/en/navigation/5_a.gif";
		en_nav_5b = new Image();
		en_nav_5b.src = "images/en/navigation/5_b.gif";	
		en_nav_6a = new Image();
		en_nav_6a.src = "images/en/navigation/6_a.gif";
		en_nav_6b = new Image();
		en_nav_6b.src = "images/en/navigation/6_b.gif";	
		en_nav_7a = new Image();
		en_nav_7a.src = "images/en/navigation/7_a.gif";
		en_nav_7b = new Image();
		en_nav_7b.src = "images/en/navigation/7_b.gif";	
		en_nav_8a = new Image();
		en_nav_8a.src = "images/en/navigation/8_a.gif";
		en_nav_8b = new Image();
		en_nav_8b.src = "images/en/navigation/8_b.gif";
	}
	ladattu = true;
}

function on(imgName) {
	if(ladattu) {
    if (document.images) {
      document.images[imgName].src = eval(imgName + "b.src");
		}
 	}
}
  
function off(imgName) {
 	if(ladattu) {
    if (document.images) {
      document.images[imgName].src = eval(imgName + "a.src");
  	}
	}
}