function NavOver (imid) {
	document.images[imid].src = 'images/nav/' + imid + '-over.gif';
}

function NavOut (imid) {
	document.images[imid].src = 'images/nav/' + imid + '.gif';
}

// This is the list of rollover images, obviously
var pics = new Array( 
	"images/nav/home-over.gif", 
	"images/nav/products-over.gif", 
	"images/nav/testimonials-over.gif", 
	"images/nav/casestudies-over.gif",
	"images/nav/clients-over.gif", 
	"images/nav/about-over.gif", 
	"images/nav/support-over.gif"
);
var myimages = new Array(pics.length);  // Initialise an "images" array 
for (i = 0; i < pics.length; i++) {     // to preload the images
	myimages[i] = new Image();
	myimages[i].src = pics[i];
}