Question

Say I got two functions that looks like this:

function main(Index)
{
    doStuff();
}

function doStuff()
{
    if(Index == 1)
    {
        document.write("Hello world!")
    }
}

And some HTML:

<input type="button" value="Click me" onclick="main(1)" />

I realize this is a very stupid way to use function-specific variables and such, but it’s just out of curiosity. So is it possible to pass the variable Index from the main function to the doStuff function?

Answer 1

So is it possible to pass the variable Index from the main function to the doStuff function?

No, not without explicitly passing it as a parameter to doStuff. Either doStuff needs to accept a parameter or it could utilize the arguments collection:

function main(index)
{
    doStuff(index);
}

function doStuff()
{
    var index = arguments[0];

    if(index == 1)
    {
        document.write("Hello world!")
    }
}