function ZebraTabelle(t) {
	var obj = t;
	var rows = [];
	var self = this;
	var hasBody = !!t.getElementsByTagName('tbody').length;
	var body = t.getElementsByTagName('tbody').length ? t.getElementsByTagName('tbody')[0] : t;
	var rows = body.getElementsByTagName('tr');
	for(var i = 1; i < rows.length; i += 2) rows[i].className += ' odd';
}

ZebraTabelle.init = function() {
	var t = document.getElementsByTagName('table');
	var r = /\bzebra\b/i;
	
	for(var i = 0; i < t.length; i++) {
		var tmp = new ZebraTabelle(t[i]);
	}
}

window.onload = function() {
ZebraTabelle.init();
};