/**
 * COMMON DHTML FUNCTIONS
 * These are handy functions I use all the time.
 *
 * By Seth Banks (webmaster at subimage dot com)
 * http://www.subimage.com/
 *
 * Up to date code can be found at http://www.subimage.com/dhtml/
 *
 * This code is free for you to use anywhere, just keep this comment block.
 */

/**
 * X-browser event handler attachment and detachment
 * TH: Switched first true to false per http://www.onlinetools.org/articles/unobtrusivejavascript/chapter4.html
 *
 * @argument obj - the object to attach event to
 * @argument evType - name of the event - DONT ADD "on", pass only "mouseover", etc
 * @argument fn - function to call
 */
function addEvent(obj, evType, fn)
{
 if (obj.addEventListener)
 {
    obj.addEventListener(evType, fn, false);
    return true;
 } 
 else if (obj.attachEvent)
 {
    var r = obj.attachEvent("on"+evType, fn);
    return r;
 } else 
 {
    return false;
 }
 
}

function removeEvent(obj, evType, fn, useCapture)
{
  if (obj.removeEventListener)
  {
    obj.removeEventListener(evType, fn, useCapture);
    return true;
  } 
  else if (obj.detachEvent)
  {
    var r = obj.detachEvent("on"+evType, fn);
    return r;
  } 
  else 
  {
    alert("Handler could not be removed");
  }
}


/**
 * Code below taken from - http://www.evolt.org/article/document_body_doctype_switching_and_more/17/30655/
 *
 * Modified 4/22/04 to work with Opera/Moz (by webmaster at subimage dot com)
 *
 * Gets the full width/height because it's different for most browsers.
 */
function getViewportHeight() 
{
	if (window.innerHeight!=window.undefined) return window.innerHeight;
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;
	if (document.body) return document.body.clientHeight; 
	return window.undefined; 
}
function getViewportWidth() 
{
	if (window.innerWidth!=window.undefined) return window.innerWidth; 
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; 
	if (document.body) return document.body.clientWidth; 
	return window.undefined; 
}

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;
}