var logoa=new Image();
var logop=new Image();


function NavPic() {
  logoa.src="/intro/logo-a.jpg";
  logop.src="/intro/logo-p.jpg";
}


function blPic(item,action) {
  if (action) {
    document.images[item].src="/intro/logo-a.jpg";
  }
  else {
    document.images[item].src="/intro/logo-p.jpg";
  }
	return true;
}