//rollover effect on large map
if (document.images)
   {
     img7on= new Image;
     img7on.src="/ovni/091/002029-htb08_2.gif";
     img7off= new Image;
     img7off.src="/ovni/091/002029-htb08_1.gif";
	 img8on= new Image;
     img8on.src="/ovni/091/002029-htb07_2.gif";
     img8off= new Image;
     img8off.src="/ovni/091/002029-htb07_1.gif"; 
	 img9on= new Image;
     img9on.src="/ovni/091/002029-htb09_2.gif";
     img9off= new Image;
     img9off.src="/ovni/091/002029-htb09_1.gif";
	 img10on= new Image;
     img10on.src="/ovni/091/002029-htb10_2.gif";
     img10off= new Image;
     img10off.src="/ovni/091/002029-htb10_1.gif";
	 img11on= new Image;
     img11on.src="/ovni/091/002029-htb11_2.gif";
     img11off= new Image;
     img11off.src="/ovni/091/002029-htb11_1.gif";
	 img12on= new Image;
     img12on.src="/ovni/091/002029-htb12_2.gif";
     img12off= new Image;
     img12off.src="/ovni/091/002029-htb12_1.gif";    
   }

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;
    }
 }