/**
 * Replaces every occurance of find with replace in aStr
 * Parameters:
 *   AStr = a string in which the replacement is to occur
 *   find = the substring that will be replaced
 *   replace = the substring that replaces find
 * Returns:  The revised string
 */
String replaceAll(String aStr, String find, String replace) {
  String[] s;
  int i;
  String result;
  s = split(aStr, find);
  result = s[0];
  for (i = 1; i < s.length; i++)
    result += replace + s[i];
  return result;
}  // replaceAll