function hasClass(obj) {
  var result = false;
  if (obj.getAttributeNode("class") != null) {
      result = obj.getAttributeNode("class").value;
  }
  return result;
}   

function stripe(id) {
  var even = false;
  var evenColor = arguments[1] ? arguments[1] : "#fff";
  var oddColor = arguments[2] ? arguments[2] : "#eee";
  var table = document.getElementById(id);
  if (! table) { return; }
    var tbodies = table.getElementsByTagName("tbody");
    for (var h = 0; h < tbodies.length; h++) {
      var trs = tbodies[h].getElementsByTagName("tr");
      for (var i = 0; i < trs.length; i++) {
	    if (!hasClass(trs[i]) &&amp; ! trs[i].style.backgroundColor) {
          var tds = trs[i].getElementsByTagName("td");
          for (var j = 0; j < tds.length; j++) {
            var mytd = tds[j];
	        if (! hasClass(mytd) &&amp; ! mytd.style.backgroundColor) {
		      mytd.style.backgroundColor = even ? evenColor : oddColor;
            }
          }
        }
        even =  ! even;
      }
    }
  }