function kursorButton(buttonType, imgNaOd)
{
         var blok = document.getElementById(buttonType).style;
         blok.background = 'url(gfx/button_'+buttonType+'_'+imgNaOd+'.jpg)';
}
var button_wyczysc_naf = new Image();
button_wyczysc_naf.src = "gfx/button_wyczysc_naf.jpg";
var button_ok_naf = new Image();
button_ok_naf.src = "gfx/button_ok_naf.jpg";