/***storage 对象*/
function storage (){var args = [].slice.call(arguments);this.storeName = location.hostname||"defaultData";this.store = {};this.inited = false;
}storage.prototype={init:function (){var doc = document;var _storeEle = doc.createElement("div"),_body = doc.body;_storeEle.style.display = "none";_storeEle.addBehavior("#default#userData");_body.appendChild(_storeEle);this.store = _storeEle;this.inited = true;},getData:function (key){if(this.inited){var _st = this.store;_st.load(this.storeName);return _st.getAttribute(key);}else{this.init();return arguments.callee.call(this,key);}},addData:function (key,val,expire){if(this.inited){var _st = this.store;_st.load(this.storeName);_st.setAttribute(key,val);if(expire){var d = new Date()+expire;_st.expires = d.toUTCString();}_st.save(this.storeName);}else{this.init();arguments.callee.call(this,key,val,expire);}},exist:function (key){return !!this.getData(key);},removeData:function (key){var _st = this.store;_st.load(this.storeName);_st.removeAttribute(key);_st.save(this.storeName);}
}
var _st = new storage("my");
var _cache = _st.getData("test");
alert(_cache);
_st.addData("test","333");