if (document.images) 
{ 

//"On" images
img1on = new Image();
img1on.src = "images/navAbout_on.jpg";
img2on = new Image();
img2on.src = "images/navAudio_on.jpg";
img3on = new Image();
img3on.src = "images/navWine_on.jpg";
img4on = new Image();
img4on.src = "images/navLinks_on.jpg";
img5on = new Image();
img5on.src = "images/navAuthor_on.jpg";

//"Off" Images
img1off = new Image();
img1off.src = "images/navAbout_off.jpg";
img2off = new Image();
img2off.src = "images/navAudio_off.jpg";
img3off = new Image();
img3off.src = "images/navWine_off.jpg";
img4off = new Image();
img4off.src = "images/navLinks_off.jpg";
img5off = new Image();
img5off.src = "images/navAuthor_off.jpg";

} 

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

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