// Derived from 'Zebra Tables' by David F. Miller (http://www.alistapart.com/articles/zebratables/)
// Modified by Jop de Klein


  // 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() {
        var even = true;
        var tables = document.getElementsByTagName("table");

        for(x=0;x!=tables.length;x++){
                table = tables[x];
                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]) && ! trs[i].style.backgroundColor) {
                                        trs[i].className = even ? "even" : "";
                                }
                                // flip from odd to even, or vice-versa
                                even =  ! even;
                        }
                }
        }
}