// this function is needed to work around 
// a bug in IE related to element attributes
function hasClass(obj) {
  var result = false;
  if (obj.getAttributeNode("class") != null) {
    if ((obj.getAttributeNode("class").value == "renderedtableAlternate") || (obj.getAttributeNode("class").value == "renderedtablenoborderAlternate")) {
      result = obj.getAttributeNode("class").value;
    }
  }
  return result;
}   

function stripe(id) {
  var even = false;
  var evenColor = arguments[1] ? arguments[1] : "#fcfcfc";
  var oddColor = arguments[2] ? arguments[2] : "#e8e8e8";
  var table = document.getElementById(id);
  if (! table) { return; }
  var tbodies = table.getElementsByTagName("table");
  for (var h = 0; h < tbodies.length; h++) {
    if (hasClass(tbodies[h])){
      var trs = tbodies[h].getElementsByTagName("tr");
      for (var i = 0; i < trs.length; i++) {
        var mytr = trs[i];
        mytr.style.backgroundColor = even ? evenColor : oddColor;
        even =  ! even;
      }
    }
  }
}