if (document.images) {            // Active Images
	img1on = new Image();      
    img1on.src = "res/fire_alarm_on.jpg"; 
	img2on = new Image();      
    img2on.src = "res/security_on.jpg"; 
	img3on = new Image();      
    img3on.src = "res/extinghishers_on.jpg"; 
	img4on = new Image();      
    img4on.src = "res/parts_on.jpg"; 
	img5on = new Image();      
    img5on.src = "res/surge_supression_on.jpg"; 
	img6on = new Image();      
    img6on.src = "res/monitoring_on.jpg"; 
	
	
	
  
  	img1off = new Image();      
    img1off.src = "res/fire_alarm.jpg"; 
	img2off = new Image();      
    img2off.src = "res/security.jpg"; 
	img3off = new Image();      
    img3off.src = "res/extinghishers.jpg"; 
	img4off = new Image();      
    img4off.src = "res/parts.jpg"; 
	img5off = new Image();      
    img5off.src = "res/surge_supression.jpg"; 
	img6off = new Image();      
    img6off.src = "res/monitoring.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");
	}
}

// -->