function colorMenuTabeRows() {
    var tables = document.getElementsByTagName("table");

    for (var n in tables) {
        var table = tables[n];
		for (var i in table.rows) {
            if (i%2 != 0) {
                table.rows[i].className = "coloredrow";
            }
        }
    }
}

//window.onload = colorMenuTabeRows; 
Event.domReady.add(colorMenuTabeRows);