A simple random string generator of any length. Only lower case characters a-z.

randomstring.js

function randomString(stringLen) {
  var lowerChars = 'abcdefghijklmnopqrstuvwxyz';
  var randomString = '';
  for (var i=0; i < stringLen; i++) {
    var rNum = Math.floor(Math.random() * 25);
    randomString += lowerChars.charAt(rNum);
    }
  return randomString;
}