function $() {
  var elements = new Array();

  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1)
      return element;

    elements.push(element);
  }

  return elements;
}
function show_and_hide(element) {
	$('flechitas').style.display = "none";
        hide_items();
	$(element).style.display = "";
}
function show_flechitas(){
        hide_items();
	$('flechitas').style.display = "";
}
function hide_items(){
	$('email').style.display = "none";
	$('telefono').style.display = "none";
	$('sugerencias').style.display = "none";
}