var nav1on = new Image(); nav1on.src = './images_rs/menu1_over.jpg';
var nav1off = new Image(); nav1off.src = './images_rs/menu1.jpg';
var nav2on = new Image(); nav2on.src = './images_rs/menu2_over.jpg';
var nav2off = new Image(); nav2off.src = './images_rs/menu2.jpg';
var nav3on = new Image(); nav3on.src = './images_rs/menu3_over.jpg';
var nav3off = new Image(); nav3off.src = './images_rs/menu3.jpg';
var nav4on = new Image(); nav4on.src = './images_rs/menu4_over.jpg';
var nav4off = new Image(); nav4off.src = './images_rs/menu4.jpg';
var nav5on = new Image(); nav5on.src = './images_rs/menu5_over.jpg';
var nav5off = new Image(); nav5off.src = './images_rs/menu5.jpg';
var nav6on = new Image(); nav6on.src = './images_rs/menu6_over.jpg';
var nav6off = new Image(); nav6off.src = './images_rs/menu6.jpg';