imgL = new Array();
end=".gif";
dir="buttons/";
function AddImg(name){
  imgL[name] = new Array(2);
  imgL[name][0] = new Image();
  imgL[name][0].src = dir + name + "_n" + end;
  imgL[name][1] = new Image();
  imgL[name][1].src =  dir + name + "_o" + end;
}
function butt(name, state){
      document.images[name].src = imgL[name][state].src;
}
AddImg("welcome");
AddImg("sylka_rubina");
AddImg("repertoire");
AddImg("events");
AddImg("lessons");
AddImg("concepts");
AddImg("contact");