function togglepix(obj) {
  var swap = document.getElementById(obj);
  swap.style.display = (swap.style.display != 'none' ? 'none' : 'block' );
};

function toggledot(obj,color) {
  if(document.getElementById) {
      var img = document.getElementById(obj);
      img.src = (img.src.indexOf("chart-key_gray.gif") != -1) ? "/images/template/chart-key_"+color+".gif" : "/images/template/chart-key_gray.gif";
  }
  return false;
}