if (document.images) { 

// top links
			img01on = new Image();      
			img01on.src = "images/lk_home-on.gif"; 
			img02on = new Image();      
			img02on.src = "images/lk_about-on.gif"; 
			img03on = new Image();      
			img03on.src = "images/lk_services-on.gif"; 
			img04on = new Image();      
			img04on.src = "images/lk_why-on.gif"; 
			img05on = new Image();      
			img05on.src = "images/lk_contact-on.gif"; 
   
			img01off = new Image();      
			img01off.src = "images/lk_home-off.gif"; 
			img02off = new Image();      
			img02off.src = "images/lk_about-off.gif"; 
			img03off = new Image();      
			img03off.src = "images/lk_services-off.gif"; 
			img04off = new Image();      
			img04off.src = "images/lk_why-off.gif"; 
			img05off = new Image();      
			img05off.src = "images/lk_contact-off.gif"; 

        }

// Images turn on.

function imgOn(imgName) {

        if (document.images) {

            document[imgName].src = eval(imgName + "on.src");

        }

}

// Images turn off.

function imgOff(imgName) {

        if (document.images) {

            document[imgName].src = eval(imgName + "off.src");

        }

}