原生JavaScript常用本地浏览器存储方法五(LocalStorage+userData的一个浏览器兼容类)

基于LocalStorage+globalStorage+userData实现的一个本地存储类

userData用来兼容ie6 ie7

由userData模仿Session的方法：浏览器关闭删除保存的记录

var userStorage = {
    isIE : null,
    Local : function(){
        if(document.all){
            var oUserData;
            if(!userStorage.isIE){
                userStorage.isIE =(function(){
                oUserData = document.body;
                oUserData.addBehavior("#default#userdata");
                })();
            }
            return {
                set : function(key,value){
                    oUserData.setAttribute(key,value);
                    oUserData.save("UserData");
                },
                get : function(key){
                    oUserData.load("UserData");
                    return oUserData.getAttribute(key);
                },
                del : function(key){
                    oUserData.load("UserData");
                    oUserData.removeAttribute(key);
                    oUserData.save("UserData");
                }
            }
        }else{
            var localStorage = window.localStorage;
            return {
                set : function(key,value){
                    localStorage.setItem(key,value);
                },
                get : function(key){
                    return localStorage.getItem(key);
                },
                del : function(key){
                    localStorage.removeItem(key);
                }
            }
        }
    },
    Session : function(){
        if(document.all){
            var oUserData;
            if(!userStorage.isIE){
                userStorage.isIE =(function(){
                oUserData = document.body;
                oUserData.addBehavior("#default#userdata");
                })();
            }
            return {
                set : function(key,value){
                    oUserData.setAttribute(key,value);
                    oUserData.save("UserData");
                    window.attachEvent('onbeforeunload', function(event){   
                        if(event.clientX <= 0 || event.clientY <=0){
                            oUserData.load("UserData");
                            oUserData.removeAttribute(key);
                            oUserData.save("UserData");
                        }
                    });
                },
                get : function(key){
                    oUserData.load("UserData");
                    return oUserData.getAttribute(key);
                },
                del : function(key){
                    oUserData.load("UserData");
                    oUserData.removeAttribute(key);
                    oUserData.save("UserData");
                }
            }
        }else{
            var sessionStorage = window.sessionStorage;
            return {
                set : function(key,value){
                    sessionStorage.setItem(key,value);
                },
                get : function(key){
                    return sessionStorage.getItem(key);
                },
                del : function(key){
                    sessionStorage.removeItem(key);
                }
            }
        }
    },
    closeWindow : function(){

    }
}

var Local = new userStorage.Local();
Local.set("name","dtdxrk");
alert(Local.get("name"));
Local.del("name");


var Session = new userStorage.Session();
Session.set("age","30");
alert(Session.get("age"));
Session.del("age");