saludos
mi cod es este...
Código:
  
 function Cookie(name) {
	this.$name = name;
	//document.cookie = "uncookie=" + encodeURIComponent("Caracteres prohibidos: ; ,   ");
	
	var time= document.cookie=";max-age=60;";
	 document.cookie=name + time;
	 if (name == null){ return; } 
alert(this.$name);	
}
 
Cookie.prototype.store(secToLive)
{
	this.$secToLive = secToLive;
	
	//var tiempoCo = document.cookie = secToLive;
	alert(this.$secToLive);
	alert(secToLive);
}
var objeto = new Cookie("Pedro");
objeto.store(10);
 
 
