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var sideForm = $('.hero.home form.side');

$(document).mouseup(function(e) {
  // if the target of the click isn't the 'sideForm' nor a descendant of 'sideForm'
	if (!sideForm.is(e.target) && sideForm.has(e.target).length === 0) { 
			sideForm.removeClass('active');
	}
});