function createCookie (name, value, expires, path, domain, secure) {
	var today = new Date();
	today.setTime (today.getTime());
	
	if (expires) {
		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 readCookie (check_name) {
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false;

	for ( i = 0; i < a_all_cookies.length; i++ ) {
		a_temp_cookie = a_all_cookies[i].split( '=' );
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

		if (cookie_name == check_name) {
			b_cookie_found = true;

			if ( a_temp_cookie.length > 1 ) {
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}

			return cookie_value;
			break;
		}

		a_temp_cookie = null;
		cookie_name = '';
	}

	if (!b_cookie_found) {
		return null;
	}
}

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