if (document.images) {
// Active Images
 
    imgcompanion_1on = new Image();                       
    imgcompanion_1on.src = "images/side-nav/welcome-e-on.gif"; 
    imgcompanion_2on = new Image();                       
    imgcompanion_2on.src = "images/side-nav/rooms-e-on.gif"; 
    imgcompanion_3on = new Image();                       
    imgcompanion_3on.src = "images/side-nav/restaurant-e-on.gif"; 
    imgcompanion_4on = new Image();                       
    imgcompanion_4on.src = "images/side-nav/services-e-on.gif"; 
    imgcompanion_5on = new Image();                       
    imgcompanion_5on.src = "images/side-nav/contact-e-on.gif"; 
    imgcompanion_6on = new Image();                       
    imgcompanion_6on.src = "images/side-nav/links-e-on.gif"; 
    imgcompanion_7on = new Image();                       
    imgcompanion_7on.src = "images/side-nav/tourist-e-on.gif"; 

// Inactive Images

    imgcompanion_1off = new Image();                       
    imgcompanion_1off.src = "images/side-nav/welcome-e.gif"; 
    imgcompanion_2off = new Image();                       
    imgcompanion_2off.src = "images/side-nav/rooms-e.gif"; 
    imgcompanion_3off = new Image();                       
    imgcompanion_3off.src = "images/side-nav/restaurant-e.gif"; 
    imgcompanion_4off = new Image();                       
    imgcompanion_4off.src = "images/side-nav/services-e.gif"; 
    imgcompanion_5off = new Image();                       
    imgcompanion_5off.src = "images/side-nav/contact-e.gif"; 
    imgcompanion_6off = new Image();                       
    imgcompanion_6off.src = "images/side-nav/links-e.gif"; 
    imgcompanion_7off = new Image();                       
    imgcompanion_7off.src = "images/side-nav/tourist-e.gif"; 

}

// Function to 'activate' images.
function imgMenuOn(imgName) {
	if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgMenuOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}