if (document.images) {rollovers=1};				// Browser is rollover compatible
	if (rollovers)									// Preload menu rollover images.  
		{ 
 
    	var contact_on  = new Image(); 
    		contact_on.src = 'images/contacton.jpg'; 
    	var contact_off  = new Image(); 
    		contact_off.src = 'images/contact.jpg'; 

    	var about_on  = new Image(); 
    		about_on.src = 'images/abouton.jpg'; 
    	var about_off  = new Image(); 
    		about_off.src = 'images/about.jpg'; 

    	var implants_on  = new Image(); 
    		implants_on.src = 'images/implantson.jpg'; 
    	var implants_off  = new Image(); 
    		implants_off.src = 'images/implants.jpg'; 

    	var cosmetics_on  = new Image(); 
    		cosmetics_on.src = 'images/cosmeticson.jpg'; 
    	var cosmetics_off  = new Image(); 
    		cosmetics_off.src = 'images/cosmetics.jpg'; 

	var home_on  = new Image(); 
    		home_on.src = 'images/homeon.jpg'; 
    	var home_off  = new Image(); 
    		home_off.src = 'images/home.jpg'; 

	var ortho_on  = new Image(); 
    		ortho_on.src = 'images/orthoon.jpg'; 
    	var ortho_off  = new Image(); 
    		ortho_off.src = 'images/ortho.jpg'; 


		}	                                                                                                  			
        function imgOn(imgName) 
            {if (rollovers) {document[imgName].src = eval(imgName + "_on.src");}}    
        function imgOff(imgName) 
            {if (rollovers) {document[imgName].src = eval(imgName + "_off.src");}}