/*
  Script Name: Javascript Cookie Script
  Author: Public Domain, with some modifications
  Script Source URI: http://techpatterns.com/downloads/javascript_cookies.php
  Version 1.1.1
  Last Update: 4 October 2007

Changes:
  1.1.1 fixes a problem with Get_Cookie that did not correctly handle case
  where cookie is initialized but it has no "=" and thus no value, the 
  Get_Cookie function generates a NULL exception. This was pointed out by olivier, thanks

1.1.0 fixes a problem with Get_Cookie that did not correctly handle
  cases where multiple cookies might test as the same, like: site1, site

This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
  */

  // this fixes an issue with the old method, ambiguous values 
  // with this test document.cookie.indexOf( name + "=" );

  // To use, simple do: Get_Cookie('cookie_name'); 
  // replace cookie_name with the real cookie name, '' are required
  function Get_Cookie(check_name) {
    // first we'll split this cookie up into name/value pairs
    // note: document.cookie only returns name=value, not the other components
    var a_all_cookies = document.cookie.split(';');
    var a_temp_cookie = '';
    var cookie_name = '';
    var cookie_value = '';
    var b_cookie_found = false; // set boolean t/f default f

    for (i = 0; i < a_all_cookies.length; i++) {
      // now we'll split apart each name=value pair
      a_temp_cookie = a_all_cookies[i].split('=');


      // and trim left/right whitespace while we're at it
      cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

      // if the extracted name matches passed check_name
      if (cookie_name == check_name) {
        b_cookie_found = true;
        // we need to handle case where cookie has no value but exists (no = sign, that is):
        if (a_temp_cookie.length > 1) {
          cookie_value = unescape(a_temp_cookie[1].replace(/^\s+|\s+$/g, ''));
        }
        // note that in cases where cookie is initialized but no value, null is returned
        return cookie_value;
        break;
      }
      a_temp_cookie = null;
      cookie_name = '';
    }
    if (!b_cookie_found) {
      return null;
    }
  }

  /*
  only the first 2 parameters are required, the cookie name, the cookie
  value. Cookie time is in milliseconds, so the below expires will make the 
  number you pass in the Set_Cookie function call the number of days the cookie
  lasts, if you want it to be hours or minutes, just get rid of 24 and 60.

Generally you don't need to worry about domain, path or secure for most applications
  so unless you need that, leave those parameters blank in the function call.
  */
  function Set_Cookie(name, value, expires, path, domain, secure) {
    // set time, it's in milliseconds
    var today = new Date();
    today.setTime(today.getTime());
    // if the expires variable is set, make the correct expires time, the
    // current script below will set it for x number of days, to make it
    // for hours, delete * 24, for minutes, delete * 60 * 24
    if (expires) {
      expires = expires * 1000 * 60 * 60 * 24;
    }
    //alert( 'today ' + today.toGMTString() );// this is for testing purpose only
    var expires_date = new Date(today.getTime() + (expires));
    //alert('expires ' + expires_date.toGMTString());// this is for testing purposes only

    document.cookie = name + "=" + escape(value) +
		((expires) ? ";expires=" + expires_date.toGMTString() : "") + //expires.toGMTString()
		((path) ? ";path=" + path : "") +
		((domain) ? ";domain=" + domain : "") +
		((secure) ? ";secure" : "");
  }

  // this deletes the cookie when called
  function Delete_Cookie(name, path, domain) {
    if (Get_Cookie(name)) document.cookie = name + "=" +
			((path) ? ";path=" + path : "") +
			((domain) ? ";domain=" + domain : "") +
			";expires=Thu, 01-Jan-1970 00:00:01 GMT";
  }