在JavaScript中声明全局变量

Question

So I have the following code:

window.fbAsyncInit = function() {
  FB.init({appId: appID, xfbml: true, status: true, cookie: true});
}   

...some lines of code

function anotherFunction()
{
    FB.ui(blah,blah);
}

FB.ui throws me a ReferenceError:FB is not defined . This wasnt happening before I wrapped FB.init inside window.fbAsyncInit , which I have to in order to init FB correctly. How can I make FB get recognized inside anotherFunction ?

FB is the facebook library. The init function is supposed to initialize and set it globally. The var FB; line wasnt there initially. I only added it to check if that will remove the error, because the error was already there

Any pointers are greatly appreciated!

Answer 1

Don't you need to initialize the variable somehow ? You seem to be calling 'init' on a null value...