function show() {
	for(var i=0; i < arguments.length; i++) 
	{
		var element = document.getElementById(arguments[i]);
		if (element != null)
			element.style.display="block";
	}
}

function hide(id) {
	for(var i=0; i < arguments.length; i++) 
	{
	var element = document.getElementById(arguments[i]);
	if (element != null)
		element.style.display="none";
	}
}

function toggle(id) {
	var element = document.getElementById(id);
	if(element.style.display=="block")
		element.style.display="none";
	else
		element.style.display="block";
}

//Taken from prototype.js
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;
}