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]) && ! 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) && ! mytd.style.backgroundColor) {
mytd.style.backgroundColor = even ? evenColor : oddColor;
}
}
}
even =  ! even;
}
}
}