gistfile1.js

slide(function(){
	spinner(spinnerContainer);
});
slide(function(){
	setOpacity("bootScreen", 1);
});
slide(function(){
	setOpacity("blah", 0);
	setOpacity("blahblah", 0.5);
	doSomethingElse("yaddayadda", 42);
});

// the code that makes it work
var currentSlide = 0;
var slides = [];
function slide(spec)
{
	slides.push(spec);
}
function nextSlide()
{
	if (slides.length > (currentSlide + 1))
		slides[++currentSlide]();
	else
	{
		currentSlide = 0;
		slides[0]();
	}
}