if (document.images) { 

// top links
			img1on = new Image();      
			img1on.src = "images/lk_home-on.gif"; 
			img2on = new Image();      
			img2on.src = "images/lk_aboutus-on.gif"; 
			img3on = new Image();      
			img3on.src = "images/lk_services-on.gif"; 
			img4on = new Image();      
			img4on.src = "images/lk_rates-on.gif"; 
			img5on = new Image();      
			img5on.src = "images/lk_contact-on.gif"; 
   
			img1off = new Image();      
			img1off.src = "images/lk_home.gif"; 
			img2off = new Image();      
			img2off.src = "images/lk_aboutus.gif"; 
			img3off = new Image();      
			img3off.src = "images/lk_services.gif"; 
			img4off = new Image();      
			img4off.src = "images/lk_rates.gif"; 
			img5off = new Image();      
			img5off.src = "images/lk_contact.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");

        }

}