//botao Home
  HomeNormal = new Image;
  HomeNormal.src = "menu/Home.gif";
  HomeOver= new Image;
  HomeOver.src = "menu/Home_2.gif";
///////////////////////////////////
//botao CFP
  CFPNormal = new Image;
  CFPNormal.src = "menu/CallforPapers.gif";
  CFPOver= new Image;
  CFPOver.src = "menu/CallforPapers_2.gif";
///////////////////////////////////
//botao PC
  PCNormal = new Image;
  PCNormal.src = "menu/ProgramCommittee.gif";
  PCOver= new Image;
  PCOver.src = "menu/ProgramCommittee_2.gif";
///////////////////////////////////
//botao KL
  KLNormal = new Image;
  KLNormal.src = "menu/KeynoteLectures.gif";
  KLOver= new Image;
  KLOver.src = "menu/KeynoteLectures_2.gif";
//botao LI
  LINormal = new Image;
  LINormal.src = "menu/LocalInformation.gif";
  LIOver= new Image;
  LIOver.src = "menu/LocalInformation_2.gif";
///////////////////////////////////
function Swap(x, y)
{ 
document.images[x].src=eval(y+'.src');
}