Не моё.
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 ) );
}
function setCookie( 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() : '' ) +
//expires.toGMTString()
( ( path ) ? ';path=' + path : '' ) +
( ( domain ) ? ';domain=' + domain : '' ) +
( ( secure ) ? ';secure' : '' );
}
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';
}
Дальше сами разберетесь?