// October 12, 2007   abj3
// Here's a basic Javascript cookie script,
// it's from the public domain, unfortunately we can't remember it's source...
// http://techpatterns.com/downloads/javascript_cookies.php

function cookieSet( name, value, expires, path, domain, secure ) {

// if the expires variable is set, expires time is for x number of days
// set time, it's in milliseconds
	var today = new Date();
	today.setTime( today.getTime() );
	if ( isNaN( expires )) { expires = 0; } else { expires = expires * 1000 * 60 * 60 * 24; }
	var expires_date = new Date( today.getTime() + (expires) );

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

function cookieGet( 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 ( var 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;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found ) { return null; }
}			

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