hryb_hover = new Image();
hryb_hover.src = "images/buttons/hryb_hover.jpg";

tance_hover = new Image();
tance_hover.src = "images/buttons/tance_hover.jpg";
  
oklube_hover = new Image();
oklube_hover.src = "images/buttons/oklube_hover.jpg";
  
hryf_hover = new Image();
hryf_hover.src = "images/buttons/hryf_hover.jpg";

gymnastika_hover = new Image();
gymnastika_hover.src = "images/buttons/gymnastika_hover.jpg";

vodne_hover = new Image();
vodne_hover.src = "images/buttons/vodne_hover.jpg";

prevsetkych_hover = new Image();
prevsetkych_hover.src = "images/buttons/prevsetkych_hover.jpg";