function Tlacitko (zapnuto, vypnuto) {
   this.zapObr = zapnuto;
   this.vypObr = vypnuto;
}

function Vymen (zapnout, jmenoobr) {
 if ( this.document[jmenoobr] ) {
   if ( zapnout )
      this.document[jmenoobr].src = tlacitka[jmenoobr].zapObr;
    else
      this.document[jmenoobr].src = tlacitka[jmenoobr].vypObr;
 }
}

var tlacitka = new Array();
tlacitka["a"] = new Tlacitko ( "images/profil_on.gif", "images/profil.gif" );
tlacitka["b"] = new Tlacitko ( "images/limuziny_on.gif", "images/limuziny.gif" );
tlacitka["c"] = new Tlacitko ( "images/ochrana_on.gif", "images/ochrana.gif" );
tlacitka["d"] = new Tlacitko ( "images/svatby_on.gif", "images/svatby.gif" );
tlacitka["e"] = new Tlacitko ( "images/vylety_on.gif", "images/vylety.gif" );
tlacitka["f"] = new Tlacitko ( "images/reference_on.gif", "images/reference.gif" );
tlacitka["g"] = new Tlacitko ( "images/cenik_on.gif", "images/cenik.gif" );
tlacitka["h"] = new Tlacitko ( "images/objednavka_on.gif", "images/objednavka.gif" );
tlacitka["i"] = new Tlacitko ( "images/kontakty_on.gif", "images/kontakty.gif" );