// Active Images
if (document.images) {
	img1on = new Image();      
	img1on.src = "img/IndexProductsButtonOver.jpg"; 
	img2on = new Image(); 
	img2on.src = "img/IndexCustomButtonOver.jpg";  
	img3on = new Image();
	img3on.src = "img/IndexAboutUsButtonOver.jpg";
	img4on = new Image();
	img4on.src = "img/IndexContactButtonOver.jpg";

	// default images                                       
	img1off = new Image();      
	img1off.src = "img/IndexProductsButton.jpg"; 
	img2off = new Image();          
	img2off.src = "img/IndexCustomButton.jpg"; 
	img3off = new Image();
	img3off.src = "img/IndexAboutUsButton.jpg";
	img4off = new Image();
	img4off.src = "img/IndexContactButton.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");
	}
}