function toggleVisibility(id)
{
	// make invisible
	if(document.getElementById(id).style.display == 'block')
	{
		document.getElementById(id).style.display = 'none';
	}

	// make visible
	else document.getElementById(id).style.display = 'block';
}

function generateRandomCartoon(){
	var i = Math.round(11*Math.random());
	i++;
	return i;
}