HTML5 localstorage和session操作

setStorage={
  getLocal : function(key){
        //获得localStorage里面的值
        var storage = window.localStorage;
        if(storage.getItem(key)){
            return storage.getItem(key);
        }else{
            return null;
        }
    },
    setLocal : function(key,value){
        var storage = window.localStorage;
        storage.removeItem(key);
        try{
            storage.setItem(key,value);
            return "";
        }catch(e){
            //打track这里
            return "error";
        }
    },
    clearLocal : function(key){
        var storage = window.localStorage;
        storage.removeItem(key);
    },
    clearLocalAll : function(){
        var storage = window.localStorage;
        storage.clear();
    },
    getSession : function(key){
        //获得sessionStorage里面的值
        var storage = window.sessionStorage;
        if(storage.getItem(key)){
            return storage.getItem(key);
        }else{
            return null;
        }
    },
    setSession : function(key,value){
        var storage = window.sessionStorage;
        storage.removeItem(key);
        try{
            storage.setItem(key,value);
            return "";
        }catch(e){
            //打track这里
            return "error";
        }
    }
}