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 = even ? evenColor : oddColor;
					}
				}
			}
			
			even = !even;
		}
	}
}