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 showDiv(div, show)
{
	$(div).style.display = (show?'block':'none');
}

function toggleDiv(div)
{
	$(div).style.display = ($(div).style.display=='none'?'block':'none');
}

function validate(regstr, str)
{
	if (window.RegExp)
	{
		reg = new RegExp(regstr);
		return reg.test(str);
	}
	return false;
}