scriptable = 0;   
  name = navigator.appName;  
  version = parseInt(navigator.appVersion);   
  if ((name == "Netscape" && version >= 2) || (name == "Microsoft Internet Explorer" && version >= 3)) 
  {
    scriptable = 1;  


	fooldaloff       = new Image();    fooldaloff.src     = 'gombok/fooldal1.gif';
	ceginfooff       = new Image();    ceginfooff.src     = 'gombok/ceginfo1.gif';
	hutestechoff       = new Image();    hutestechoff.src     = 'gombok/hutestech1.gif';
	epuletklimaoff       = new Image();    epuletklimaoff.src     = 'gombok/epuletklima1.gif';
	kozpontiporszivooff       = new Image();    kozpontiporszivooff.src     = 'gombok/kozponti-porszivo1.gif';
	elerhetosegoff       = new Image();    elerhetosegoff.src     = 'gombok/elerhetoseg1.gif';
	

	fooldalon        = new Image();    fooldalon.src      = 'gombok/fooldal2.gif';
	ceginfoon        = new Image();    ceginfoon.src      = 'gombok/ceginfo2.gif';
	hutestechon        = new Image();    hutestechon.src      = 'gombok/hutestech2.gif';
	epuletklimaon        = new Image();    epuletklimaon.src      = 'gombok/epuletklima2.gif';
	kozpontiporszivoon        = new Image();    kozpontiporszivoon.src      = 'gombok/kozponti-porszivo2.gif';
	elerhetosegon        = new Image();    elerhetosegon.src      = 'gombok/elerhetoseg2.gif';
	

       
  }
  
  function switchto(name, on) 
  {    
    if (scriptable == 1) 
    {      
       image = eval(name + (on == 1 ? "on.src" : "off.src"));      
       document[name].src = image;    
    }  
  }