if (document.images) {            // Active Images
	img1on = new Image();      
    img1on.src = "res/products_on.jpg"; 
	img2on = new Image();      
    img2on.src = "res/aboutus_on.jpg"; 
	img3on = new Image();      
    img3on.src = "res/order_on.jpg"; 
	img4on = new Image();      
    img4on.src = "res/contactus_on.jpg"; 

	
  
    img1off = new Image();      
    img1off.src = "res/products.jpg"; 
	img2off = new Image();      
    img2off.src = "res/aboutus.jpg"; 
	img3off = new Image();      
    img3off.src = "res/order.jpg"; 
	img4off = new Image();      
    img4off.src = "res/contactus.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");
        }
}
// -->