Own Thizer js commons functions

thizer-commons.js

String.prototype.inArray = function(arr) {
  if (typeof arr !== 'object') {
    return false
  }

  var result = false
  for (var i in arr) {
    if (this.toString() == arr[i]) {
      result = true
      break
    }
  }
  return result
}

/**
 * Add to the Date object a function to get future days from
 * current date.
 *
 * @param {int} days
 * @returns {Date}
 */
Date.prototype.addDays = function(days) {
  return new Date(
    this.getFullYear(),
    this.getMonth(),
    this.getDate()+days,
    this.getHours(),
    this.getMinutes(),
    this.getSeconds()
  );
}