nav1on = new Image(); 
nav1on.src = "images/nav1_on.png";
nav1off = new Image(); 
nav1off.src = "images/nav1.png";

nav1_1on = new Image(); 
nav1_1on.src = "images/nav1_1_on.png";
nav1_1off = new Image(); 
nav1_1off.src = "images/nav1_1.png";

nav1_2on = new Image(); 
nav1_2on.src = "images/nav1_2_on.png";
nav1_2off = new Image(); 
nav1_2off.src = "images/nav1_2.png";

nav2on = new Image(); 
nav2on.src = "images/nav2_on.png";
nav2off = new Image(); 
nav2off.src = "images/nav2.png";

nav3on = new Image(); 
nav3on.src = "images/nav3_on.png";
nav3off = new Image(); 
nav3off.src = "images/nav3.png";

nav3_1on = new Image(); 
nav3_1on.src = "images/nav3_1_on.png";
nav3_1off = new Image(); 
nav3_1off.src = "images/nav3_1.png";

nav3_2on = new Image(); 
nav3_2on.src = "images/nav3_2_on.png";
nav3_2off = new Image(); 
nav3_2off.src = "images/nav3_2.png";

nav3_3on = new Image(); 
nav3_3on.src = "images/nav3_3_on.png";
nav3_3off = new Image(); 
nav3_3off.src = "images/nav3_3.png";

nav4on = new Image(); 
nav4on.src = "images/nav4_on.png";
nav4off = new Image(); 
nav4off.src = "images/nav4.png";

nav4_1on = new Image(); 
nav4_1on.src = "images/nav4_1_on.png";
nav4_1off = new Image(); 
nav4_1off.src = "images/nav4_1.png";

nav4_2on = new Image(); 
nav4_2on.src = "images/nav4_2_on.png";
nav4_2off = new Image(); 
nav4_2off.src = "images/nav4_2.png";

nav5on = new Image(); 
nav5on.src = "images/nav5_on.png";
nav5off = new Image(); 
nav5off.src = "images/nav5.png";

nav5_1on = new Image(); 
nav5_1on.src = "images/nav5_1_on.png";
nav5_1off = new Image(); 
nav5_1off.src = "images/nav5_1.png";

nav5_2on = new Image(); 
nav5_2on.src = "images/nav5_2_on.png";
nav5_2off = new Image(); 
nav5_2off.src = "images/nav5_2.png";

nav5_3on = new Image(); 
nav5_3on.src = "images/nav5_3_on.png";
nav5_3off = new Image(); 
nav5_3off.src = "images/nav5_3.png";

nav6on = new Image(); 
nav6on.src = "images/nav6_on.png";
nav6off = new Image(); 
nav6off.src = "images/nav6.png";

nav6_1on = new Image(); 
nav6_1on.src = "images/nav6_1_on.png";
nav6_1off = new Image(); 
nav6_1off.src = "images/nav6_1.png";

nav6_2on = new Image(); 
nav6_2on.src = "images/nav6_2_on.png";
nav6_2off = new Image(); 
nav6_2off.src = "images/nav6_2.png";