// Function to 'activate' images.
	function imgOn(imgName) {
		
	        if (document.images) {
	            document[imgName].src = eval(imgName + "on.src");
				document["description"].src = "https://www.inknowvation.com/Images/nav/description_" + imgName + ".gif";					
	        }
	}	
	// Function to 'deactivate' images.
	function imgOff(imgName) {
	        if (document.images) {
	            document[imgName].src = eval(imgName + "off.src"); 		
				document["description"].src = "https://www.inknowvation.com/Images/nav/description_default.gif";
	        }
	}