$(function() {

// Display different reference balloons every so many seconds.
var current = 0;
var num = $('.balloon').length;
var wait = true;

$('#position-' + current).fadeIn('slow');

setInterval(function() {
	if (wait) {
		$('#position-' + current).fadeOut('slow');
		wait = false;
		return;
	}
	wait = true;

	current = current < num - 1 ? current + 1:0;
	$('#position-' + current).fadeIn('fast');
}, 5000);

// Slide down header.
window.setTimeout(function() {
	if ($('#slideDownElement').length > 0) {
		$('#slideDownElement').slideDown();
	};
}, 4000);

// Make the balloons fly away when user hovers over.
$('#balloon-purple').one('mouseover', function() {
	$(this).animate({
		top: '-500px',
		marginLeft: '1200px'
	}, 3000);
});

$('#balloon-green').one('mouseover', function() {
	$(this).animate({
		top: '-500px',
		marginLeft: '800px'
	}, 4000);
});

});

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