+/**
+ * Copyright 2004 Ho Ngoc Duc [http://come.to/duc]. All Rights Reserved.<p>
+ * Permission to use, copy, modify, and redistribute this software and its
+ * documentation for personal, non-commercial use is hereby granted provided that
+ * this copyright notice appears in all copies.
+ */
+
var PI = Math.PI;
/* Discard the fractional part of a number, e.g., INT(3.2) = 3 */