if (document.images)
   {
     pic1on= new Image(71,74);
     pic1on.src="tl_uvod_h.gif";  
     pic2on= new Image(118,74);
     pic2on.src="tl_ubyt_u.gif"; 
     pic3on= new Image(119,74);
     pic3on.src="tl_strav_u.gif"; 
	 pic4on= new Image(80,74);
     pic4on.src="tl_relax_u.gif"; 
     pic5on= new Image(91,74);
     pic5on.src="tl_cennik_u.gif";
	 pic6on= new Image(78,74);
     pic6on.src="tl_okolie_u.gif";
	 pic7on= new Image(87,74);
     pic7on.src="tl_galeria_u.gif";
	 pic8on= new Image(107,74);
     pic8on.src="tl_kont_u.gif";
	 pic9on= new Image(96,74);
     pic9on.src="tl_skolenia_u.gif";
	 
	 pic1off= new Image(71,74);
     pic1off.src="tl_uvod.gif";
     pic2off= new Image(118,74);
     pic2off.src="tl_ubyt.gif"; 
	 pic3off= new Image(119,74);
     pic3off.src="tl_strav.gif"; 
	 pic4off= new Image(80,74);
     pic4off.src="tl_relax.gif"; 
	 pic5off= new Image(91,74);
     pic5off.src="tl_cennik.gif"; 
	 pic6off= new Image(78,74);
     pic6off.src="tl_okolie.gif"; 
	 pic7off= new Image(87,74);
     pic7off.src="tl_galeria.gif"; 
	 pic8off= new Image(107,74);
     pic8off.src="tl_kont.gif"; 
	 pic9off= new Image(96,74);
     pic9off.src="tl_skolenia.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;
    }
 }