if (document.images)
   {
     home_greenon= new Image(278,90);
     home_greenon.src="http://chartier-group.com/images/home_green_on.png";  
     home_greenoff= new Image(278,90);
     home_greenoff.src="http://chartier-group.com/images/home_green.png";

     home_realon= new Image(278,90);
     home_realon.src="http://chartier-group.com/images/home_real_on.png";  
     home_realoff= new Image(278,90);
     home_realoff.src="http://chartier-group.com/images/home_real.png";

     before_afteron= new Image(240,61);
     before_afteron.src="http://chartier-group.com/images/before_after_on.png"; 
     before_afteroff= new Image(240,61);
     before_afteroff.src="http://chartier-group.com/images/before_after.png";

     before_after2on= new Image(240,61);
     before_after2on.src="http://chartier-group.com/images/before_after_on.png"; 
     before_after2off= new Image(240,61);
     before_after2off.src="http://chartier-group.com/images/before_after.png";

     nj_incentiveson= new Image(240,61);
     nj_incentiveson.src="http://chartier-group.com/images/nj_clean_energy_on.png"; 
     nj_incentivesoff= new Image(240,61);
     nj_incentivesoff.src="http://chartier-group.com/images/nj_clean_energy.png";

     photoson= new Image(240,61);
     photoson.src="http://chartier-group.com/images/click_photos_on.png"; 
     photosoff= new Image(240,61);
     photosoff.src="http://chartier-group.com/images/click_photos.png";
}

function lightup(imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }