Ext.state.CookieProvider = function(config){
Ext.state.CookieProvider.superclass.constructor.call(this);
this.path = "/";
this.expires = new Date(new Date().getTime()+(1000*60*60*24*7)); //7 days
this.domain = null;
this.secure = false;
Ext.apply(this, config);
this.state = this.readCookies();
};
Ext.state.CookieProvider = function(config){
Ext.state.CookieProvider.superclass.constructor.call(this);
this.path = "/";
this.expires = new Date(new Date().getTime()+(1000*60*60*24*7)); //7 days
this.domain = null;
this.secure = false;
Ext.apply(this, config);
this.state = this.readCookies();
};

this.expires: new Date(new Date().getTime()+(1000*60*60*24*365)), //一年
this.expires: new Date(new Date().getTime()+(1000*60*60*24*365)), //一年

Ext.state.Manager.setProvider(
new Ext.state.CookieProvider({
expires: new Date(new Date().getTime()+(1000*60*60*24*365)), //一年
}));