window.onload = colorRows;
function colorRows() {var myTR = document.getElementsByTagName('tr');
	for (var i=0;i<myTR.length;i++) { {  myTR[i].className = 'table_level_2'; } 
		if (i%2) {  myTR[i].className = 'table_level_1'; } 	}  
	var myTH = document.getElementsByTagName('th');
		for (var j=0;j<myTH.length;j++) {  myTH[j].className = 'table_level_41'; }}