colorTables = function() {
	
	var rows = document.getElementById("main").getElementsByTagName("TR");
	
	for (var i=1; i<rows.length; i++) {
		if (rows[i].className != "odd" && rows[i].className != "even") {
			if (i % 2) {
				rows[i].className+=" odd";
			} else {
				rows[i].className+=" even";
			}
		}
	}
}