zebra = function() {
	var tables = document.getElementsByTagName("table");
	for (var t = 0; t < tables.length; t++) {
		var rows = tables[t].getElementsByTagName("tr");
		for (var i = 1; i < rows.length; i += 2)
		if (!/(^|\s)odd(\s|$)/.test(rows[i].className)) rows[i].className += " odd";
	}
};
if (window.attachEvent) window.attachEvent("onload", zebra);