var LIT_ASTERISCO 		= "*"
var LIT_ALMOHADILLA 	= "#"

var KEYS_ASTERISCO 		= LIT_ASTERISCO 	+ "Cc";
var KEYS_ALMOHADILLA 	= LIT_ALMOHADILLA + "Aa-";

var KEYS_NUMBERS = "0123456789";


function navigationHandler() {
	var key = String.fromCharCode(window.event.keyCode);
	var cmdKey = null;
	if ( KEYS_ASTERISCO.indexOf(key) != -1 ) {
		cmdKey = "*";
	} else if ( KEYS_ALMOHADILLA.indexOf(key) != -1 ) {
		cmdKey = "#";
	} else if ( KEYS_NUMBERS.indexOf(key) != -1 ) {
		cmdKey = key;
	}
	if ( cmdKey ) {
			var cmd = document.getElementById(commands[cmdKey]);
			if ( cmd ) cmd.click();
			// Cancelar propagación
			if ( cmdKey == LIT_ASTERISCO || cmdKey == LIT_ALMOHADILLA ) window.event.returnValue = null;
	}
}

function setFocus(id) {
	if ( id == null ) id = 'defaultFocus';
	var e = document.getElementById(id);
	if ( e ) e.focus();
}

function isRequiredLength(element,length) {
	var e = document.getElementById(element);
	return ( e.value.length >= length );
}