// Active Images
if (document.images) {
	img1on = new Image();      
	img1on.src = "img/navx_01.jpg"; 
	img2on = new Image(); 
	img2on.src = "img/navx_02.jpg";  
	img3on = new Image();
	img3on.src = "img/navx_03.jpg";
	img4on = new Image();
	img4on.src = "img/navx_04.jpg";
	img5on = new Image();
	img5on.src = "img/navx_05.jpg";
	img6on = new Image();
	img6on.src = "img/navx_06.jpg";
	img7on = new Image();
	img7on.src = "img/navx_07.jpg";
	img8on = new Image();
	img8on.src = "img/navx_08.jpg";
	img9on = new Image();
	img9on.src = "img/navx_09.jpg";

	// default images                                       
	img1off = new Image();      
	img1off.src = "img/nav0_01.jpg"; 
	img2off = new Image();          
	img2off.src = "img/nav0_02.jpg"; 
	img3off = new Image();
	img3off.src = "img/nav0_03.jpg";
	img4off = new Image();
	img4off.src = "img/nav0_04.jpg";
	img5off = new Image();
	img5off.src = "img/nav0_05.jpg";
	img6off = new Image();
	img6off.src = "img/nav0_06.jpg";
	img7off = new Image();
	img7off.src = "img/nav0_07.jpg";
	img8off = new Image();
	img8off.src = "img/nav0_08.jpg";
	img9off = new Image();
	img9off.src = "img/nav0_09.jpg";
}

// Function to 'activate' images
function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "on.src");
	}
}

// Function to 'deactivate' images
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
	}
}