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 toggle(id) 
{
	var state = $(id).style.display;
	if (state == 'none') {
		$(id).style.display = 'block';
	} else {
		$(id).style.display = 'none';
	}
}