function mostrarStatus(texto) {
	window.status = texto;
	return true;
}

function trim(s) 
{
	while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r')) {
		s = s.substring(1,s.length);
	}
	while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r')) {
		s = s.substring(0,s.length-1);
	}
	return s;
}

function validarNumeros(e) {
	if (navigator.appName == 'Microsoft Internet Explorer') {
		key = window.event.keyCode;
	} else {
		key = e.which;
	}

	if (key < 48 || key > 57) {
		return false;
	}
	return true;  
}