JavaScript - Function Not Modifying Global Variable

I'm having trouble modifying a variable within a text adventure game I'm writing code for in JavaScript. I want to change the value of a global variable using a function within a function (no, not closure).

/*This is just example code.*/
    var health = 100;
    var exp = 0;

    function refreshStats() {
      health -= 10;
      exp += 1;
    }

    function foo(flag) {
      if (flag == DONOTHING) {
        refreshStats();
      }

      if (health <= 0) {
        say("You died, bwahaha.");
      }

      if ((exp/10) == Math.floor(exp/10)) {
        health += 10;
        say("You leveled up!");
      }
    }

How the game works is th开发者_C百科at each function (defined as actions or areas within the game) will be called by buttons and forms placed by JavaScript that the user can click or write in, respectively. I need refreshStats() to update the health and exp variables so foo() can use them correctly; the function doesn't seem to be updating the variables until after foo() runs. I do wonder if it's a browser compatibility issue, which really would tick me off, but I'm hoping it isn't that.

Any suggestions?

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Store your values into your window object, so it will be available in any scope of that window:

//take care to not overwrite native properties of the window
window.health = 100;
window.exp = 0;

function refreshStats() {
  health -= 10;
  exp += 1;
}

---

It looks like it's working for me. Perhaps it's a scoping issue - instead of example code, could you post your actual relevant code?