// 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) {
     result = obj.getAttributeNode("class").value;
    }
    return result;
}

function stripe(id) {

    // the flag we'll use to keep track of
    // whether the current row is odd or even
    var even = false;

    // if arguments are provided to specify the colours
    // of the even & odd rows, then use the them;
    // otherwise use the following defaults:
    var evenColor = arguments[1] ? arguments[1] : "#fff";
    var oddColor = arguments[2] ? arguments[2] : "#eee";

    // obtain a reference to the desired table
    // if no such table exists, abort
    var table = document.getElementById(id);
    if (! table) { return; }

    // by definition, tables can have more than one tbody
    // element, so we'll have to get the list of child
    // <tbody>s
    var tbodies = table.getElementsByTagName("tbody");

    // and iterate through them...
    for (var h = 0; h < tbodies.length; h++) {

     // find all the &lt;tr&gt; elements...
      var trs = tbodies[h].getElementsByTagName("tr");

      // ... and iterate through them
      for (var i = 0; i < trs.length; i++) {

        // avoid rows that have a class attribute
        // or backgroundColor style
        if (! hasClass(trs[i]) &&
            ! trs[i].style.backgroundColor) {

          // get all the cells in this row...
          var tds = trs[i].getElementsByTagName("td");



          //tds.concat(ths);

          // and iterate through them...
          for (var j = 0; j < tds.length; j++) {

            var mytd = tds[j];

            // avoid cells that have a class attribute
            // or backgroundColor style
            if (! hasClass(mytd) &&
                ! mytd.style.backgroundColor) {

              mytd.style.backgroundColor =
                even ? evenColor : oddColor;

            }
          }

          var tds = trs[i].getElementsByTagName("th");

          for (var j = 0; j < tds.length; j++) {

            var mytd = tds[j];

            // avoid cells that have a class attribute
            // or backgroundColor style
            if (! hasClass(mytd) &&
                ! mytd.style.backgroundColor) {

              mytd.style.backgroundColor =
                even ? evenColor : oddColor;

            }
          }

        }
        // flip from odd to even, or vice-versa
        even =  ! even;
      }
    }
}