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if (document.images) {
            homeon = new Image();          
            homeon.src ="navigation/homeon.gif";   
      	  	searchon = new Image();          
            searchon.src ="navigation/searchon.gif"; 
            conuson = new Image();          
            conuson.src ="navigation/conuson.gif";   
						aboutuson = new Image();          
            aboutuson.src ="navigation/aboutuson.gif";  // Active Images
            productson = new Image(); 
            productson.src ="navigation/productson.gif";   
						technicalon = new Image(); 
            technicalon.src ="navigation/technicalon.gif";   
            cataloguerequeston = new Image(); 
            cataloguerequeston.src ="navigation/cataloguerequeston.gif";    
            downloadcatalogueon = new Image(); 
            downloadcatalogueon.src ="navigation/downloadcatalogueon.gif"; 
            enquiryformon = new Image();          
            enquiryformon.src ="navigation/enquiryformon.gif";  
            nwnbon = new Image();          
            nwnbon.src ="navigation/nwnbon.gif";  
            
            homeoff = new Image();          
            homeoff.src ="navigation/homeoff.gif"; 
            searchoff = new Image();          
            searchoff.src ="navigation/searchoff.gif"; 
            conusoff = new Image();          
            conusoff.src ="navigation/conusoff.gif"; 
		 				aboutusoff = new Image();          
            aboutusoff.src ="navigation/aboutusoff.gif";       // Inactive Images
         	 	productsoff = new Image(); 
            productsoff.src ="navigation/productsoff.gif";   
            technicaloff = new Image(); 
            technicaloff.src ="navigation/technicaloff.gif";   
            cataloguerequestoff = new Image(); 
            cataloguerequestoff.src ="navigation/cataloguerequestoff.gif";    
            downloadcatalogueoff = new Image(); 
            downloadcatalogueoff.src ="navigation/downloadcatalogueoff.gif"; 
            enquiryformoff = new Image();          
            enquiryformoff.src ="navigation/enquiryformoff.gif"; 
            nwnboff = new Image();          
            nwnboff.src ="navigation/nwnboff.gif";                    
        }

// 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");
                        
        }
}
// -->