function DoRightStr(bigstr, smstr) {
  strlen = bigstr.length;
  strpos = bigstr.indexOf(smstr);
  if (strpos == -1) {
   // not found - return nothing
   return "";
  } else {
   resultstr = bigstr.substring(strpos + smstr.length, strlen);
   return resultstr.trim();
  }
}

function DoLeftStr(bigstr, smstr) {
  strpos = bigstr.indexOf(smstr);
  if (strpos == -1) {
   // not found - return nothing
   return "";
  } else {
   resultstr = bigstr.substring(0, strpos);
   return resultstr;
  }
}

function DoLeftNum(bigstr, numchars) {
  if (numchars <= 0) {
    return "";
  } else {
    if (numchars > String(bigstr).length)
      return bigstr;
    } else {
      return String(bigstr).substring(0, numchars);
    }
  }
}

function DoRightNum(bigstr, numchars) {
  var bigLen = String(bigstr).length;
  if (numchars <= 0) {
    return "";
  } else {
    if (numchars > bigLen )
      return bigstr;
    } else {
      return String(bigstr).substring(bigLen, bigLen - numchars);
    }
  }
}