but1On= new Image;but1On.src= "img/theatr_on.gif"   ;but1Off = new Image;but1Off.src= "img/theatr_of.gif";
but2On= new Image;but2On.src= "img/sport_on.gif"   ;but2Off = new Image;but2Off.src= "img/sport_of.gif";
but3On= new Image;but3On.src= "img/forum_on.gif"   ;but3Off = new Image;but3Off.src= "img/forum_of.gif";
but4On= new Image;but4On.src= "img/nauczy_on.gif"  ;but4Off = new Image;but4Off.src= "img/nauczy_of.gif";
but5On= new Image;but5On.src= "img/movie_on.gif"   ;but5Off = new Image;but5Off.src= "img/movie_of.gif";
but6On= new Image;but6On.src= "img/paints_on.gif"   ;but6Off = new Image;but6Off.src= "img/paints_of.gif";

function ImgOn(imgName){imgOn = eval(imgName + "On.src");        document [imgName].src = imgOn;}
function ImgOff(imgName){imgOff = eval(imgName + "Off.src");document [imgName].src = imgOff;}