Convert a numeric month to a string month name

function convertMonthToWords(intMonth) {

  var strMonth = "";

  if (intMonth == undefined || intMonth == isNaN || Number(intMonth) < 1 || Number(intMonth) > 12) {

    strMonth = "Invalid Month";

  }

  else {

    var monthNames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];

    strMonth = monthNames[Number(intMonth - 1)];  // -1 because javascript month starts with 0 for January

  }

  return strMonth

}

Use it like this:

var strMonth = convertMonthToWords(2);    // strMonth will be March

Append characters to the end of a string

function appendString(length, StringToAppendTo, appendStringWith) {

  var returnString = ""

  returnString += StringToAppendTo;

  if (StringToAppendTo.length < length) {

    for (var i = 0; i < length - 1; i++) {

      returnString += appendStringWith;

    }

  }

  return returnString;

}

Use it like this:

var appendedString = appendString(2, "1", "0");

Pad string with characters

function padString(length, StringToPad, PadStringWith) {

  var returnString = ""

  if (StringToPad.length < length) {

    for (var i = 0; i < length - 1; i++) {

      returnString += PadStringWith;

    }

  }

  returnString += StringToPad;

  return returnString;

}

Use it like this:

var strMonth = padString(2, "11", "0");