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

	for(var x=0;x!=tables.length;x++){
		var 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");

		even = 0;
		for (var i = 0; i < trs.length; i++) {
			if(even)
				trs[i].className += " even";

			even = !even;
			}
		}
	}
}

window.onload = stripe;