JavaScript Cookies

JS_Cookies.js

// I've had this file for a long time and it seemed like a good feature to add here

function CreateCookie(Name, Value, Days) {
  //  creates a cookie for web pages
  //  creates the cookie Name, sets the Value, and then makes it last however long the Days are
  if (Days) {
    NewDate = new Date();
    NewDate.setTime(NewDate.getTime() + (Days * 24 * 60 * 60 * 1000));
    Expires = "; expires=" + NewDate.toGMTString();
  } else {
    Expires = "";
  }
  document.cookie = Name + "=" + Value + Expires + "; path=/";
}

function ReadCookie(Name) {
  //  attempts to read a previously created cookie and returns the data, or returns "null" if there isn't a cookie
  Name = Name + "=";
  CookieArr = document.cookie.split(';');
  for (i = 0; i < CookieArr.length; i++) {
    while (CookieArr[i].charAt(0) == ' ') {
      CookieArr[i] = CookieArr[i].substring(1, CookieArr[i].length);
    }
    if (CookieArr[i].indexOf(Name) == 0) {
      return CookieArr[i].substring(Name.length, CookieArr[i].length);
    }
  }
  return null;
}

function EraseCookie(Name) {
  //  deletes the cookie Name by setting the time to be kept to a past time
  CreateCookie(Name, "", -1);
}