Variable in return function

My personal opinion would be to use the object orientated approach.

var SomeObject = function(){
    var text = "";
    this.setText = function(value){
        text = value;
    };
    this.getText = function(){
        return text;
    };
};

var myObject = new SomeObject();
myObject.setText("This is the text");
alert(myObject.getText());

Since, you haven't declared nowhere the variable value, this variable will be declared on the global scope (as a property of the window object in the environment of a browser). So you can access it as below. However, this is bad practice, I mean to use a variable without having first declared it. This is called implied global.

function x (){
  return{
    foo:function(text){
      value = text;
    }
  }
}
a=x();
a.foo("some text");
document.write(value);