Is it possible to restrict the scope of a javascript function?

Question

Suppose I have a variables in the global scope.

Suppose I wish to define a function which I can guarantee will not have access to this variable, is there a

Answer 1

Create a local variable with the same name. If you have a global variable like this:

var globalvar;

In your function:

function noGlobal(); {
    var globalvar;
}

If the function refers to globalvar, it will refers to the local one.