Changing and value of variable in function

[Lagon666]

How can i change the value of a variant that defined in a function for ever?

function test()
{
this.data = 'hello';
}

function change()
{
var a = new test();
a.data = 'hi';
alert(a.data);
}

change(); // return hi

var b = new test();
alert(b.data); // return hello

Is any solution for return the new value of 'data' variable that replaced using change() function.

[hsriat]

function test() //<<== is a class
{
this.data = 'hello';
}

function change()
{
var a = new test(); //<<== is object of test class
a.data = 'hi'; // you change data variable of 'a' object but not 'test' class.
alert(a.data);
}

change(); // return hi //of course!

var b = new test(); //another object... not the last object a
alert(b.data); // return hello //of course... you didn't change this 'b' object

Solution:
Make the function within that test function

function test() {
    this.data = "hello";
    this.change = function() {
        this.data = "hi";
    }
}

var a = new test();
alert(a.data); //will return hello
a.change();
alert(a.data); //will return hi

[Lagon666]

Thanks

But is it possible to return changed value (hi) using another object defining ('b' object), but not using 'a' object?
Something like last line.

function test()
{
this.data = 'hello';
this.change = function()
{
this.data = 'hi';
}
}

var a = new test();
alert(a.data); // will return hello
a.change();
alert(a.data); // will return hi

var b = new test(); // or 'var b = test();' but its wrong
alert(b.data); // return hello (hi?)

[gits]

basicly you would need to call the change method to get 'hi' returned or create a derived obj like this:

function test() {
    this.data = 'hello';
    this.change = function() {
        this.data = 'hi';
    }
}

var a = new test();
alert(a.data); // will return hello
a.change();
alert(a.data); // will return hi

function myTest() {
    this.change();
}

myTest.prototype = new test();
 
var b = new myTest();
alert(b.data);

kind regards