Ами това е кода, но като затворя браузъра cookie-то се трие а аз исакм да се пази завинаги или то поне да не се трие при затваряне на браузъра ми

	<script src="PATH TO SCRIPT/cookie.js" type="text/javascript" language="javascript"></script>   


function retrieveCookie( cookieName ) {

	/* retrieved in the format

	cookieName4=value; cookieName3=value; cookieName2=value; cookieName1=value

	only cookies for this domain and path will be retrieved */

	var cookieJar = document.cookie.split( "; " );

	for( var x = 0; x < cookieJar.length; x++ ) {

		var oneCookie = cookieJar[x].split( "=" );

		if( oneCookie[0] == escape( cookieName ) ) { return oneCookie[1] ? unescape( oneCookie[1] ) : ''; }

	}

	return null;

}


function setCookie( cookieName, cookieValue, lifeTime, path, domain, isSecure ) {

	if( !cookieName ) { return false; }

	if( lifeTime == "delete" ) { lifeTime = -10; } //this is in the past. Expires immediately.

	/* This next line sets the cookie but does not overwrite other cookies.

	syntax: cookieName=cookieValue[;expires=dataAsString[;path=pathAsString[;domain=domainAsString[;secure]]]]

	Because of the way that document.cookie behaves, writing this here is equivalent to writing

	document.cookie = whatIAmWritingNow + "; " + document.cookie; */

	document.cookie = escape( cookieName ) + "=" + escape( cookieValue ) +

		( lifeTime ? ";expires=" + ( new Date( ( new Date() ).getTime() + ( 1000 * lifeTime ) ) ).toGMTString() : "" ) +

		( path ? ";path=" + path : "") + ( domain ? ";domain=" + domain : "") +

		( isSecure ? ";secure" : "");

	//check if the cookie has been set/deleted as required

	if( lifeTime < 0 ) { if( typeof( retrieveCookie( cookieName ) ) == "string" ) { return false; } return true; }

	if( typeof( retrieveCookie( cookieName ) ) == "string" ) { return true; } return false;

}

Ако си задал на браузъра да трие кукитата при затваряне, просто го отмени.

Ами то е зададено до загуба на валидност и няма опция да не се трият