var MyObj = function(){
   this.Name = "Stackoverflow";
}

MyObj.prototype.prop = "OK";

var instance = new MyObj();
instance.prop = "OK";

console.log(instance.hasOwnProperty("Name")); //true
console.log(Object.getOwnPropertyNames(instance)); //[ 'Name', 'prop' ]

var MyDream = function(){}
MyDream.prototype.canAccessThisMethod = function(x){};

var instanceSample = new MyDream();

instanceSample.canAccessThisMethod("blabla"); //because of prototype
MyDream.method(blabla); // didn't work.

instanceSample.prototype.method = function( x ){
...
}

var MyDream = function(){}
MyDream.prototype.canAccessThisMethod = function(x){ };

var instanceSample = new MyDream();

instanceSample.canAccessThisMethod("blabla"); //because of prototype
MyDream.method(blabla); //How can we write "MyDream.method" in this example

var MyDream = function(){}

MyDream.prototype.canAccessThisMethod = function(x){ };

MyDream.method(blabla);

MyDream.method = function(x) {
    console.log(x);
}

MyDream.method("bla bla");