function func(value){

    ...

};

func(newValue);


var newValue;

(function func(value){
    value.tu = "salut";
})(newValue);

newValue.tu; //salut




var Object = func(Object || {});




var Module = (function(){

    var toto = "bla";
    var tata = "blu";
    var tutu = function(){};

    return {
        tata: tata,
        toto: toto
    }

});


Module.tata; //success
Module.toto; //error



var LoginModule = (function(){

    var privates = {};
    var publics = {};

    privates.login = "";
    privates. password = "";

    privates.checkLogin(){
        //check if login and mdp is true
        return true;
    };

    privates.connectUser(){
        if(privates.checkLogin()){
            //Trucs chelous
        }
    }


    publics.setLogins = function(log, mdp){
        privates.login = log;
        privates.password = mdp;

        privates.checkLogin();
    };

    return publics;

});

LoginModule.setLogins("Steph", "motdepass"); //success







var LoginModule;


(function(publics){

    var privates = {};

    privates.login = "";
    privates. password = "";

    privates.checkLogin(){
        //check if login and mdp is true
        return true;
    };

    privates.connectUser(){
        if(privates.checkLogin()){
            //Trucs chelous
        }
    }


    publics.setLogins = function(log, mdp){
        privates.login = log;
        privates.password = mdp;

        privates.checkLogin();
    };

    publics.toitoi = "";


})(LoginModule || {});


//DEUXIEME FOIS
(function(publics){

    var privates = {};

    privates.login = "";
    privates. password = "";

    privates.checkLogin(){
        //check if login and mdp is true
        return true;
    };

    privates.connectUser(){
        if(privates.checkLogin()){
            //Trucs chelous
        }
    }


    publics.setLogins = function(log, mdp){
        privates.login = log;
        privates.password = mdp;

        privates.checkLogin();
    };

    publics.toitoi = "";


})(LoginModule || {});



/////////////////////