function hi(n) {
  obj1 = eval("document.all.menu"+n);
  obj2 = eval("document.all.menuleft"+n);
  obj1.style.backgroundImage="url(img/hi.gif)";
  obj2.style.backgroundColor="#68A8C1";
}

function ou(n) {
  obj1 = eval("document.all.menu"+n);
  obj2 = eval("document.all.menuleft"+n);
  obj1.style.backgroundImage="url(img/p.gif)";
  obj2.style.backgroundColor="#9CCFE0";
}