dropMenus = new Array('about','portfolio','news');

function dropShow(menu) {
  if (document.all) {
    document.all[menu+'Menu'].style.visibility = 'visible';
  } else if (document.getElementById) {
    document.getElementById(menu+'Menu').style.visibility = 'visible';
  }
  for (n=0; n<dropMenus.length; n++) {
    if (dropMenus[n] != menu) {
      if (document.all) {
        document.all[dropMenus[n]+'Menu'].style.visibility = 'hidden';
      } else if (document.getElementById) {
        document.getElementById(dropMenus[n]+'Menu').style.visibility = 'hidden';
      }
    }
  }
}

function dropHide() {
  for (n=0; n<dropMenus.length; n++) {
    if (document.all) {
      document.all[dropMenus[n]+'Menu'].style.visibility = 'hidden';
    } else if (document.getElementById) {
      document.getElementById(dropMenus[n]+'Menu').style.visibility = 'hidden';
    }
  }
}

function rollOver(button) {
  if (document.all) {
    document.all[button].className = 'navOver';
  } else if (document.getElementById) {
    document.getElementById(button).className = 'navOver';
  }
}

function rollOut(button) {
  if (document.all) {
    document.all[button].className = 'navOut';
  } else if (document.getElementById) {
    document.getElementById(button).className = 'navOut';
  }
}