var a = new Image(); a.src = '../images/nav_on_06.jpg';
var b = new Image(); b.src = '../images/nav_off_06.jpg';
var c = new Image(); a.src = '../images/nav_on_07.jpg';
var d = new Image(); b.src = '../imaages/nav_off_07.jpg';
var e = new Image(); a.src = '../images/nav_on_08.jpg';
var f = new Image(); b.src = '../imaages/nav_off_08.jpg';
var g = new Image(); a.src = '../images/nav_on_09.jpg';
var h = new Image(); b.src = '../imaages/nav_off_09.jpg';
var i = new Image(); a.src = '../images/nav_on_10.jpg';
var j = new Image(); b.src = '../imaages/nav_off_10.jpg';
var k = new Image(); a.src = '../images/nav_on_11.jpg';
var l = new Image(); b.src = '../imaages/nav_off_11.jpg';