var oLastBtn=0;
function RaiseButton()
{
  window.event.cancelBubble=true;
  oBtn = window.event.srcElement;
  var bChosen = false;
  if(oLastBtn && oLastBtn != oBtn)
  {
    HideButton();
  }
  if(oBtn.buttonType)
  {
    oBtn.className = oBtn.buttonType + "Up";
    oLastBtn=oBtn;
  }
  else
  {
    oLastBtn = 0;
  }
}

function DepressButton()
{
  window.event.cancelBubble=true;
  oBtn = window.event.srcElement;
  if(oBtn.buttonType)
  {
    oBtn.className = oBtn.buttonType + "Down";
  }
}

function HideButton()
{
  if ((oLastBtn.buttonType == "LeftNavChosen") || (oLastBtn.buttonType == "LeftNavSubChosen") || (oLastBtn.buttonType == "appNavChosen") || (oLastBtn.buttonType == "appNavSubChosen"))
  {
    oLastBtn.className = oLastBtn.buttonType;
  }
  else
  {
    oLastBtn.className = oLastBtn.buttonType + "Off";
  }
}