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";

        }

    }

}