function mostrarLoading()
{
	var loading = document.getElementById('loading');
	loading.style.display = '';
}

function enviaForm(frm)
{
	var form = document.getElementById(frm);
	form.submit();
}

function mostrar(id, campo, nombre)
{
	toggle(id);
	var l = document.getElementById(campo);
	l.innerHTML = l.innerHTML == nombre + ' (+)' ? nombre + ' (-)': nombre + ' (+)';
}

function visible (element) {
					 return $(element).style.display != 'none';
				 }

function toggle(element) {
					element = $(element);
					Element[Element.visible(element) ? 'hide' : 'show'](element);
					return element;
				}

function hide(element) {
				$(element).style.display = 'none';
				return element;
			}

function show(element) {
				$(element).style.display = '';
				return element;
			}