Javascript - Access a Global Variable from inside a function

Hi,

Is is possible to access a global variable for use inside a function?

Thanks for help in advance

Mike

Mike,

you need to either:
a) post this question in a branch that is designated for questions (this one is for showcasing "finished" javascripts)
or
b) test it yourself

I recommend b as being the speedier and more satisfying course of action

Well someone has moved the question to the right forum so it is only reasonable to answer it.

Three examples for you:

var a = 1;
b = function() {
var c = 2;
a = c;
}

In this example because the function b() has no local variable a the reference to that variable inside the function is taken to refer to the global variable.


var a = 1;
b = function() {
var a = 3, c = 2;
a = c;
}

In this version function b() does have its own ;ocal variable a and so the references within the function are to the local a and not to the global a. To reference the global variable we can change that code to:

var a = 1;
b = function() {
var a = 3, c = 2;
window.a = c;
}

The window.a reference is to the global variable a and not to the local variable a.

Sorry for posting in the wrong forum. Genuine mistake.

@felgall - sincere thanks for your answer. It is excellent. Thanks for taking the time to explain it. Appreciate it.