/*
 * 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 
 *  
 * 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.  
 * */
        
// To use, simple do: getCookie('cookie_name'); 
// replace cookie_name with the real cookie name, '' are required
    
function getCookie( 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 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
    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;
    }

    var expires_date = new Date( today.getTime() + (expires) );

    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-2001 00:00:01 GMT";
    }
}