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");