function  addLoadListener(fn)
{
  if  (typeof window.addEventListener != 'undefined')
  {
    window.addEventListener('load', fn, false);
  }
  else  if  (typeof document.addEventListener != 'undefined')
  {
    document.addEventListener('load', fn, false);
  }
  else  if  (typeof window.attachEvent != 'undefined')
  {
    window.attachEvent('onload', fn);
  }
  else
  {
    var oldfn = window.onload;
    if  (typeof window.onload != 'function')
    {
      window.onload = fn;
    }
    else
    {
      window.onload = function()
      {
        oldfn();
        fn();
      };

    }

  }
}


function  attachEventListener(target, eventType, functionRef, capture) {

  if  (typeof target.addEventListener != "undefined")
  {
    target.addEventListener(eventType, functionRef, capture);
  }
  else if (typeof target.attachEvent != "undefined")
  {
    target.attachEvent("on" + eventType, functionRef);
  }
  else
  {
    eventType = "on" + eventType;

    if  (typeof target[eventType] == "function")
    {

      var oldListener = target[eventType];

      target[eventType] = function()
      {
        oldListener();

        return functionRef();
      };

    }
    else
    {
      target[eventType] = functionRef;
    }

  }

}



function getEventTarget(event)
{
  var targetElement = null;

  if  (typeof event.target != "undefined")
  {
    targetElement = event.target;
  }
  else
  {
    targetElement = event.srcElement;
  }

  while (targetElement.nodeType == 3 && targetElement.parentNode != null)
  {
    targetElement = targetElement.parentNode;
  }

  return targetElement;



}



function stopDefaultAction(event)
{
  event.returnValue = false;

  if (typeof event.preventDefault != "undefined")
  {
    event.preventDefault();
  }

  return true;
}

function  engage(event)
{
  if  (typeof event == "undefined")
  {
    event = window.event;
  }

  alert("Engage!");

  stopDefaultAction(event);

  return false;

}
function http_request() {

  var request;
  var handler;
  var method;
  var url;
  var content;

  var arg = http_request.arguments;

  if    (arg[0])                          { url = arg[0]; }

  if    (arg[1].toLowerCase() ==  "post") { method  = "POST"; }
  else                                    { method  = "GET";  }

  if    (arg[2])                          { handler = arg[2]; }
  else                                    { handler = null;   }

  if    (arg[3])                          { content = arg[3]; }

  var handler_arg = "request";

  for (i=0; i<arg.length; i++)  {

    if  (i > 3) { handler_arg += ",'" + arg[i] + "'"; }

  }

  try {
    request = new XMLHttpRequest();
  }
  catch (e) {

    try {
      request = new ActiveXObject("Microsoft.XMLHTTP");
    }
    catch (e) {
      request = null;
    }

  }

  if (request) {

    request.onreadystatechange = function() {

      if (request.readyState == 4)  {

        if (request.status == 200)  {

          if  (handler)  {
            eval(handler + "(" + handler_arg + ");");
          }

        }
        else  {


        }

      }

    };

    request.open(method,url,true);

    if (method  == "POST") {
      request.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
    }

    request.send(content);

  }


}

function ajax_request_handler()  {

  var arg = ajax_request_handler.arguments;

  var  request  =  arg[0];

  var  id  =  arg[1];

  document.getElementById(id).innerHTML  =  request.responseText;

}


function ajax_url()  {

	var arg = ajax_url.arguments;

	var	contentfile	=	arg[0];
	var	contentid		=	arg[1];
  var handler   	= "ajax_request_handler";

  http_request(contentfile,'POST',handler,'',contentid);

	return false;

}

/**********************************************************************************/
/*                                                                                */
/*  Function Name:  ajax_fetch_url()                                              */
/*  Description:                                                                  */
/*  Parameters      url, content                                                  */
/*  Input:                                                                        */
/*  Output:         object                                                        */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           17 October 2007                                               */
/*                                                                                */
/**********************************************************************************/

function  ajax_fetch_url()  {

  var arg = ajax_fetch_url.arguments;

  var ajaxurl 	= arg[0];
  var targetid	= arg[1];

  var input   = "";

  var handler = "ajax_request_handler";

  http_request(ajaxurl,'GET',handler,input,targetid);

  return false;

}


/**********************************************************************************/
/*                                                                                */
/*  Function Name:  ajax_fetch_url_tab()                                          */
/*  Description:                                                                  */
/*  Parameters                                                                    */
/*  Input:                                                                        */
/*  Output:                                                                       */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           18 October 2007                                               */
/*                                                                                */
/**********************************************************************************/

function  ajax_fetch_url_tab()  {

  var arg = ajax_fetch_url_tab.arguments;

  var thistab = arg[0];
  var ajaxurl = arg[1];
  var id      = arg[2];


  var activetabclass    = "tab_on";
  var inactivetabclass  = "tab_off";

  var tab     = getElementsByAttribute('class',activetabclass);

  for (i=0; i<tab.length; i++)  {
    tab[i].className  = inactivetabclass;
  }

  thistab.className = activetabclass;

  if  (document.getElementById(id))  {

    ajax_fetch_url(ajaxurl,id);

  }

  return false;

}



/**********************************************************************************/
/*                                                                                */
/*  Function Name:  toggle_tabcontent()                                          */
/*  Description:                                                                  */
/*  Parameters                                                                    */
/*  Input:                                                                        */
/*  Output:                                                                       */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           18 October 2008                                               */
/*                                                                                */
/**********************************************************************************/

function  toggle_tabcontent()  {

  var arg = toggle_tabcontent.arguments;

  var thistab = arg[0];
  var id      = arg[1];


  var activetabclass    = "tab_on";
  var inactivetabclass  = "tab_off";

  var tab     = getElementsByAttribute('class',activetabclass);

  for (i=0; i<tab.length; i++)  {
    tab[i].className  = inactivetabclass;
  }

  thistab.className = activetabclass;


  var tabcontent		= getElementsByAttribute('class','tabcontentpanel');
  
  for (i=0; i<tabcontent.length; i++)  {
    tabcontent[i].style.display  = "none";
  }


	document.getElementById(id).style.display	=	"block";

  return false;

}function identifyBrowser()
{
  var agent = navigator.userAgent.toLowerCase();

  if  (typeof navigator.vendor != "undefined" && navigator.vendor == "KDE" && typeof window.sidebar != "undefined")
  {
    return "kde";
  }
  else if (typeof window.opera != "undefined")
  {
    var version = parseFloat(agent.replace(/.*opera[\/ ]([^ $]+)./,"$1"));

    if  (version >= 7)
    {
      return "opera7";
    }
    else if (version >=5)
    {
      return "opera5"
    }

    return false;

  }
  else if (typeof document.all != "undefined")
  {

    if  (typeof document.getElementById != "undefined")
    {

      var browser = agent.replace(/.*ms(ie[\/ ][^ $]+).*/,"$1").replace(/ /, "");

      if  (typeof document.uniqueID != "undefined")
      {

        if  (browser.indexOf("5.5") != -1)  {
          return browser.replace(/(.*5\.5).*/,"$1");
        }
        else
        {
          return browser.replace(/(.*)\..*/,"$1");
        }

      }
      else
      {
        return "ie5mac";
      }

    }


    return false;

  }
  else if (typeof document.getElementById != "undefined")
  {
    if  (navigator.vendor.indexOf("Apple Computer, Inc.") != -1)
    {
      if  (typeof window.XMLHttpRequest != "undefined")
      {
        return "safari1.2";
      }
      else if (agent.indexOf("gecko") != -1)
      {
        return "mozilla";
      }

    }

    return false;

  }

  return false;

}function navigate_photosetphoto(evt)	{

	evt	=	(evt) ? evt : ((event) ? event : null);

	if	((evt) && (document.getElementById('photoset')))	{

		var	photoset	=	document.getElementById('photoset');
		var	nextid		=	photoset.photosetphotoid_next.value;
		var	previd		=	photoset.photosetphotoid_previous.value;
	
		var	thingPressed	=	"";
		
		var elem = (evt.target) ? evt.target : evt.srcElement;
		
		thingPressed	=	(evt.charCode) ? evt.charCode : evt.keyCode;

		if	(thingPressed == "39")	{
			//	next photo	
			ajax_fetch_url('ajax_photosetphoto.php?photosetphotoid=' + nextid, 'photosetphoto');
			
		} else if (thingPressed == "37")	{
			//	previous photo
			ajax_fetch_url('ajax_photosetphoto.php?photosetphotoid=' + previd, 'photosetphoto');
		}
		
	}

	return false;

}


function initKeyDetect()	{

	attachEventListener(document, "keydown", function (evt) { navigate_photosetphoto(evt); }, false);

	return true;
}


addLoadListener(initKeyDetect);function  initTooltips()
{
  var tips  = getElementsByAttribute("class", "hastooltip");

  for (var i=0; i<tips.length;i++)
  {
    attachEventListener(tips[i], "mouseover", showTip, false);
    attachEventListener(tips[i], "mouseout", hideTip, false);
  }

  return true;
}

function showTip(event)
{
  if  (typeof event == "undefined")
  {
    event = window.event;
  }

  var target  = getEventTarget(event);

  while (target.className == null || !/(^| )hastooltip( |$)/.test(target.className))
  {
    target  = target.parentNode;
  }

  var tip     = document.createElement("div");
  var content = target.getAttribute("title");

  target.tooltip  = tip;
  target.setAttribute("title","");

  if  (target.getAttribute("id") != "")
  {
    tip.setAttribute("id", target.getAttribute("id") + "tooltip");
  }

  tip.className   = "cp_tooltip";
  tip.appendChild(document.createTextNode(content));

  var scrollingPosition = getScrollingPosition();
  var cursorPosition  = [0, 0];

  if  (typeof event.pageX != "undefined" && typeof event.pageY != "undefined")
  {
    cursorPosition[0] = event.pageX;
    cursorPosition[1] = event.pageY;
  }
  else
  {
    cursorPosition[0] = event.clientX + scrollingPosition[0];
    cursorPosition[1] = event.clientY + scrollingPosition[1];
  }

  tip.style.position    = "absolute";
  tip.style.left        = cursorPosition[0] + 10 + "px";
  tip.style.top         = cursorPosition[1] + 10 + "px";
  tip.style.visibility  = "hidden";

  document.getElementsByTagName("body")[0].appendChild(tip);

  var viewportSize  = getViewportSize();

  if  (cursorPosition[0] - scrollingPosition[0] + 10 + tip.offsetWidth > viewportSize[0] - 25)
  {
    tip.style.left  = scrollingPosition[0] + viewportSize[0] - 25 - tip.offsetWidth + "px";
  }
  else
  {
    tip.style.left = cursorPosition[0] + 10 + "px";
  }


  if  (cursorPosition[1] - scrollingPosition[1] + 10 + tip.offsetHeight > viewportSize[1] - 25)
  {

    if  (event.clientX > (viewportSize[0] - 25 - tip.offsetWidth))
    {
      tip.style.top = cursorPosition[1] - tip.offsetHeight - 10 + "px";
    }
    else
    {
      tip.style.top = scrollingPosition[1] + viewportSize[1] - 25 - tip.offsetHeight + "px";
    }

  }
  else
  {
    tip.style.top = cursorPosition[1] + 10 + "px";
  }

  tip.style.visibility  = "visible";

  return true;

}


function  hideTip(event)
{
  if  (typeof event == "undefined")
  {
    event = window.event;
  }

  var target  = getEventTarget(event);

  while (target.className == null || !/(^| )hastooltip( |$)/.test(target.className))
  {
    target  = target.parentNode;
  }

  if  (target.tooltip != null)
  {
    target.setAttribute("title",target.tooltip.childNodes[0].nodeValue);
    target.tooltip.parentNode.removeChild(target.tooltip);
  }

  return false;
}
function  getElementsByAttribute(attribute, attributeValue)
{
  var elementArray  = new Array();
  var matchedArray  = new Array();

  if  (document.all)
  {
    elementArray = document.all;
  }
  else
  {
    elementArray  = document.getElementsByTagName("*");
  }

  for (var i=0; i<elementArray.length; i++)  {

    if  (attribute == "class")  {
      var pattern = new RegExp("(^| )" + attributeValue + "( |$)");

      if (pattern.test(elementArray[i].className))
      {
        matchedArray[matchedArray.length] = elementArray[i];
      }

    }
    else if (attribute == "for")
    {
      if  (elementArray[i].getAttribute("htmlFor") ||  elementArray[i].getAttribute("for"))
      {
        if  (elementArray[i].htmlFor == attributeValue)
        {
          matchedArray[matchedArray.length] = elementArray[i];
        }
      }
    }
    else if (elementArray[i].getAttribute(attribute) == attributeValue)
    {
      matchedArray[matchedArray.length] = elementArray[i];
    }

  }

  return matchedArray;

}


function getScrollingPosition()
{
  var position  = [0,0];

  if  (typeof window.pageYOffset != 'undefined')
  {
    position  = [window.pageXOffset,window.pageYOffset];
  }
  else if (typeof document.documentElement.scrollTop != 'undefined' && document.documentElement.scrollTop > 0)
  {
    position  = [document.documentElement.scrollLeft,document.documentElement.scrollTop];
  }
  else if (typeof document.body.scrollTop != 'undefined')
  {
    position  = [document.body.scrollLeft, document.body.scrollTop];
  }

  return position;

}

function getViewportSize()
{
  var size  = [0,0];

  if  (typeof window.innerWidth != 'undefined')
  {
    size  = [window.innerWidth,window.innerHeight];
  }
  else if (typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0)
  {
    size  = [document.documentElement.clientWidth,document.documentElement.clientHeight];
  }
  else
  {
    size  = [document.getElementsByTagName('body')[0].clientWidth, document.getElementsByTagName('body')[0].clientHeight,];
  }

  return  size;

}











function return_select_value()	{

	var	arg = return_select_value.arguments;

	var	obj	=	arg[0];

	if	(obj.options.length > 0)	{
	
		for (i=0; i<obj.options.length; i++)	{
		
			if	(obj.options[i].selected)	{
			
				return obj.options[i].value;
			
			}
		
		}
	
	}

	return "";

}


function toggle_visibility() {

  var arg = toggle_visibility.arguments;
  
  var	elementid	=	arg[0];

  var objref  = document.getElementById(elementid);

  if      (objref.style.display == "none")  { objref.style.display  = "block";  }
  else if (objref.style.display == "")      { objref.style.display  = "block";  }
  else                                      { objref.style.display  = "none";   }
}


function fetch_cdata()	{

	var	arg = fetch_cdata.arguments;

	var	rootnode	=	arg[0];
	var	tagname		=	arg[1];

	var	tagnode	=	rootnode.getElementsByTagName(tagname)[0];
	var	cdata		=	tagnode.firstChild.data;
	
	return cdata;

}

/**********************************************************************************/
/*                                                                                */
/*  Function Name:  append_text()                                                 */
/*  Description:                                                                  */
/*  Parameters      obj (parent object), text                                     */
/*  Input:                                                                        */
/*  Output:                                                                       */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           5 April 2006                                                  */
/*                                                                                */
/**********************************************************************************/

function  append_text(obj,text)  {
  var  domtext  =  document.createTextNode(text);
  obj.appendChild(domtext);
}

/**********************************************************************************/
/*                                                                                */
/*  Function Name:  remove_children()                                             */
/*  Description:                                                                  */
/*  Parameters      parent (parent object)                                        */
/*  Input:                                                                        */
/*  Output:                                                                       */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           4 April 2006                                                  */
/*                                                                                */
/**********************************************************************************/

function remove_children(parent)  {

  var  child;

  if  (parent.hasChildNodes())  {

    for  (i=0;i<parent.childNodes.length;i++)  {
      child  =  parent.childNodes[i];
      parent.removeChild(child);
    }

  }

  return;

}

/**********************************************************************************/
/*                                                                                */
/*  Function Name:  is_empty()                                                    */
/*  Description:    Determines if the testexp zero length                         */
/*  Parameters      testexp                                                       */
/*  Input:                                                                        */
/*  Output:         true or false                                                 */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           21 December 2004                                              */
/*                                                                                */
/**********************************************************************************/

function is_empty(testexp) {

  if    (testexp.length == 0) { return true;  }
  else                        { return false; }

}

/**********************************************************************************/
/*                                                                                */
/*  Function Name:  is_name()                                                     */
/*  Description:    Determines if the testexp is a valid name                     */
/*  Parameters      testexp                                                       */
/*  Input:                                                                        */
/*  Output:         true or false                                                 */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           21 December 2004                                              */
/*                                                                                */
/**********************************************************************************/

function is_name(testexp) {
  var re  = /^([A-Za-z-]{2,})\s?([A-Za-z-]*)$/;

  if    (re.test(testexp))  { return true;  }
  else                      { return false; }
}

/**********************************************************************************/
/*                                                                                */
/*  Function Name:  is_email()                                                    */
/*  Description:    Determines if the testexp is a valid email address            */
/*  Parameters      testexp                                                       */
/*  Input:                                                                        */
/*  Output:         true or false                                                 */
/*                                                                                */
/*  Author:         Raymond Chow                                                  */
/*  Date:           21 December 2004                                              */
/*                                                                                */
/**********************************************************************************/

function is_email(testexp) {

  var re  = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,5})+$/;

  if    (re.test(testexp))  { return true; }
  else                      { return false;}
}
function submit_comment_insert()	{

	var	arg = submit_comment_insert.arguments;

	var	url				=	arg[0];
	var	id				=	arg[1];
	var	formref		=	arg[2];

  var  obj_error_comment  = document.getElementById('error_comment');
  var  obj_error_name     = document.getElementById('error_name');
  var  obj_error_email    = document.getElementById('error_email');

  remove_children(obj_error_comment);
  remove_children(obj_error_name);
  remove_children(obj_error_email);

  var name        = formref.authorname.value;
  var email       = formref.authoremail.value;
  var comment     = formref.commenttext.value;

  var	haltpost		=	false;
  var haltsubmit  = false;

  if  (is_empty(comment)) {
    haltsubmit  = true;
    haltpost    =  true;
    append_text(obj_error_comment,"Please provide Comments.");
  }
  if  (is_empty(name))    {
    haltsubmit  = true;
    haltpost    = true;
    append_text(obj_error_name,"Please provide Name.");
  }
  if  (!is_email(email))  {
    haltsubmit  = true;
    haltpost    = true;
    append_text(obj_error_email,"Please provide E-Mail address.");
  }


  if  (!haltpost)  {
	
		var handler   = "ajax_comment_insert_handler";
	
		var	param			=	"";
		
		param					+=	"photoid=" + formref.photoid.value;
		param					+=	"&authorname=" + formref.authorname.value;
		param					+=	"&authoremail=" + formref.authoremail.value;
		param					+=	"&commenttext=" + formref.commenttext.value;
	
		http_request(url,'POST',handler,param,id,'commentform');

	}

	return false;
	
}



function ajax_comment_insert_handler()  {

  var arg = ajax_comment_insert_handler.arguments;

  var  request  =  arg[0];

  var  id  =  arg[1];

  document.getElementById(id).innerHTML  =  request.responseText;

}