var ImageNorm;
var ImageActive;

if (document.images) 
{ 
  ImageNorm       = new Image();
  ImageNorm.src   = "zcode/images/tarsier.png";
  ImageActive     = new Image();
  ImageActive.src = "zcode/images/tarsierw.png";
}


function TarsierOnOver()
{
  id = 'tarsierImg';
  elem = document.getElementById(id);
  if (elem)
  {
    elem.src = eval('ImageActive.src');
  }
}

function TarsierOnOut()
{
  id = 'tarsierImg';
  elem = document.getElementById(id);
  if (elem)
  {
    elem.src = eval('ImageNorm.src');
  }
}