browserName=navigator.appName; 
browserVer=parseInt(navigator.appVersion);
  if ((browserName=="Netscape" && browserVer>=3) || (browserName=="Microsoft Internet Explorer" && browserVer>=4))    
  version="n3";
  else
    version="n2";
  if (version=="n3")
   {
     pic1on= new Image(152,37);
     pic1on.src="images/home_page_on.jpg";  
     pic1off= new Image(152,37);
     pic1off.src="images/home_page_off.jpg";
					
     pic2on= new Image(152,37);
     pic2on.src="images/rehabilitation_on.jpg";  
     pic2off= new Image(152,37);
     pic2off.src="images/rehabilitation_off.jpg";
				 	
     pic3on= new Image(152,37);
     pic3on.src="images/stallion_at_stud_on.jpg";  
     pic3off= new Image(152,37);
     pic3off.src="images/stallion_at_stud_off.jpg";
 			
     pic4on= new Image(152,37);
     pic4on.src="images/equisage_on.jpg";  
     pic4off= new Image(152,37);
     pic4off.src="images/equisage_off.jpg";

     pic5on= new Image(152,37);
     pic5on.src="images/alternative_therapy_on.jpg";  
     pic5off= new Image(152,37);
     pic5off.src="images/alternative_therapy_off.jpg";
     
     pic6on= new Image(152,37);
     pic6on.src="images/contact_us_on.jpg";  
     pic6off= new Image(152,37);
     pic6off.src="images/contact_us_off.jpg";
	
     pic7on= new Image(152,37);
     pic7on.src="images/facilities_on.jpg";  
     pic7off= new Image(152,37);
     pic7off.src="images/facilities_off.jpg";
     
     pic8on= new Image(152,37);
     pic8on.src="images/magnatherapy_on.jpg";  
     pic8off= new Image(152,37);
     pic8off.src="images/magnatherapy_off.jpg";
     
     pic9on= new Image(152,37);
     pic9on.src="images/hydrotherapy_on.jpg";  
     pic9off= new Image(152,37);
     pic9off.src="images/hydrotherapy_off.jpg";
  }
function lightup(imgName)
 {
   if (version=="n3")
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
				}
 }
function turnoff(imgName)
 {
   if (version=="n3")
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }