/*
Script Name: Javascript Cookie Script
Author: Public Domain, with some modifications
Script Source URI: http://techpatterns.com/downloads/javascript_cookies.php
Version 1.0.0
Last Update: 30 May 2004

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 function gets the cookie, if it exists
function getCookie( name ) {
   var start = document.cookie.indexOf( name + "=" );
   var len = start + name.length + 1;
   if( (!start) && ( name != document.cookie.substring(0, name.length) ) ) {
      return null;
   }
   if( start == -1 ) {
      return null;
   }
   var end = document.cookie.indexOf( ";", len );
   if( end == -1 ) {
      end = document.cookie.length;
   }
   return unescape( document.cookie.substring(len, end) );
}


/*
Only the first 2 parameters are required:  the cookie name and the cookie
value.  Cookie time is in milliseconds, so the below "expires" will make the
number you pass in the setCookie 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 setCookie( name, value, expires, path, domain, secure ) {

   // set time, it's in milliseconds
   var today = new Date();
   today.setTime( today.getTime() );
   // alert( 'today ' + today.toGMTString() );  // this is for testing purpose only

   // 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;
   }
   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 deleteCookie( name, path, domain ) {
   if( getCookie(name) ) {
      document.cookie = name + "=" +
         ( (path)? ";path=" + path : "" ) +
         ( (domain)? ";domain=" + domain : "" ) +
         ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
   }
}