function display_contacts (id) {
	var span_elem = document.getElementById('span'+id);
	var whichcategory = document.getElementById('contact'+id);

	if (span_elem.className=="contact-collapsed") {
		span_elem.className="contact-expanded";
		whichcategory.className="show";
	} else {
		whichcategory.className="hide";
		span_elem.className="contact-collapsed";
	}

}