function preload(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj+' = new Image()');
		eval(imgObj+'.src = "'+imgSrc+'"');
	}
}

function changeImage(imgName,imgObj,layer) {
	if (document.images) {
		if (document.layers) {
			if (layer!=null){
				eval('document.layers.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src');
			}
			else {
				document.images[imgName].src = eval(imgObj+".src");
			}
		}
		else {
			document.images[imgName].src = eval(imgObj+".src");
		}
	}
}

	
	
	preload('img0_on','/media/nav-home-on.gif')
	preload('img1_on','/media/nav-studio-on.gif')
	preload('img2_on','/media/nav-print-on.gif')
	preload('img3_on','/media/nav-environmental-on.gif')
	preload('img4_on','/media/nav-contact-on.gif')
	preload('img5_on','/media/back-on.gif')
	preload('img6_on','/media/viewmore-on.gif')
	preload('img7_on','/media/visitstudio-on.gif')	

	
	preload('img0_off','/media/nav-home.gif')
	preload('img1_off','/media/nav-studio.gif')
	preload('img2_off','/media/nav-print.gif')
	preload('img3_off','/media/nav-environmental.gif')
	preload('img4_off','/media/nav-contact.gif')
	preload('img5_off','/media/back.gif')
	preload('img6_off','/media/viewmore.gif')
	preload('img7_off','/media/visitstudio.gif')