function alternateRowColors() {
	var id = 'semtable';
	var styles = new Array('lightblue','darkblue');
	var table = document.getElementById(id);
	rows = table.getElementsByTagName("tr");
	for(var i=0;i<rows.length;i++) {
		rows[i].setAttribute("class", styles[i% styles.length]);
		data = rows[i].getElementsByTagName("td");
		data[0].setAttribute("class", "align-right");
	}
}
window.onload=alternateRowColors;