FBReady.js

function FBReady( func ) {
					
	// If facebook is already loaded,
	// just call the function
	if ( FBReady.done ) return func();

	// If the stack already exists,
	// push the function onto it,
	// otherwise, initialize a stack
	// of functions
	FBReady.stack ?
		FBReady.stack.push( func ) :
		FBReady.stack = [ func ] ;				
};

FBReady.callStack = function( FB ) {
	// Call the stack of functions
	for ( var i = 0, count = FBReady.stack.length; i < count; i++ ) {
		FBReady.stack[ i ].call( FB );
	}
	// Empty the stack
	FBReady.stack = null;
};

window.fbAsyncInit = function() {
	FB.init({
		appId: '132217840124735'
	,	status: true
	,	cookie: true
	,	xfbml: true
	});

	// If a stack of functions exist, start
	// calling them
	FBReady.stack && FBReady.callStack( FB );

	// Flag that we're done so any functions
	// passed to FBReady after this point
	// will execute immediately
	FBReady.done = true;
};

// Asynchronous FB API loading, copied from their site
(function() {
	var e = document.createElement('script');
	e.async = true;
	e.src = document.location.protocol +
	'//connect.facebook.net/en_US/all.js';
	document.getElementById('fb-root').appendChild(e);
}());

// Examples

FBReady(function(){
    alert('facebook is ready!')
    // FB.getLoginStatus( function(){ // Do stuff } );
});

FBReady(function(){
    // You can pass multiple functions to FBReady and they
    // will all execute in the order they were passed
    alert('Hello World!')
});