在函数 JavaScript 中使用函数

Question

I have kept below simply for context:

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How could I make a function inside a function (without nesting or using variables)?

Example of what I want:

var openPage = 1
function pageGame()
{

}
function pageUpgrades()
{
    openPage = 2;
    do checkPage()
}
function pageStats()
{

}
function checkPage()
{
    if (openPage ==     1)
    {
        document.getElementById("game").className = "open";
        document.getElementById("upgrades").className = "";
        document.getElementById("stats").className = "";            
    }
    if (openPage ==     2)
    {
        document.getElementById("game").className = "";
        document.getElementById("upgrades").className = "open";
        document.getElementById("stats").className = "";    
    }
    if (openPage ==     3)
    {
        document.getElementById("game").className = "";
        document.getElementById("upgrades").className = "";
        document.getElementById("stats").className = "open";    
    }
}

I want the function "checkPage" to run when I tell it to in "pageUpgrades"

Sorry if this is a duplicate, I couldn't find any answers anywhere.

Edit - Note: I did attempt to use a simple checkPage() (without the do)

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Edit 3.5 years later: Wow, I certainly regret this post.

Please do note, for future viewers, if you ever want to to run a function within a function in JavaScript, simply specify the function within your code. Functions are accessible from anywhere so once specified you can execute your function simply by calling it.

If your function has parameters, specify those else you simply need: function()

It is good practice to use semicolons even when unnecessary, see the comments below this post for the confusion there.

Answer 1

我不知道为什么在函数调用之前有do关键字，但除此之外，您已经从pageUpgrades调用checkPage函数。