// JavaScript Document

<!--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->

// written by Dean Edwards, 2005
// with input from Tino Zijdel - crisp@xs4all.nl
// http://dean.edwards.name/weblog/2005/10/add-event/
function addEvent(element, type, handler) {
   if (element.addEventListener)
      element.addEventListener(type, handler, false);
   else {
      if (!handler.$$guid) handler.$$guid = addEvent.guid++;
      if (!element.events) element.events = {};
      var handlers = element.events[type];
      if (!handlers) {
         handlers = element.events[type] = {};
         if (element['on' + type]) handlers[0] = element['on' + type];
         element['on' + type] = handleEvent;
      }
   
      handlers[handler.$$guid] = handler;
   }
}
addEvent.guid = 1;

function removeEvent(element, type, handler) {
   if (element.removeEventListener)
      element.removeEventListener(type, handler, false);
   else if (element.events && element.events[type] && handler.$$guid)
      delete element.events[type][handler.$$guid];
}

function handleEvent(event) {
   event = event || fixEvent(window.event);
   var returnValue = true;
   var handlers = this.events[event.type];

   for (var i in handlers) {
      if (!Object.prototype[i]) {
         this.$$handler = handlers[i];
         if (this.$$handler(event) === false) returnValue = false;
      }
   }

   if (this.$$handler) this.$$handler = null;

   return returnValue;
}

function fixEvent(event) {
   event.preventDefault = fixEvent.preventDefault;
   event.stopPropagation = fixEvent.stopPropagation;
   return event;
}
fixEvent.preventDefault = function() {
   this.returnValue = false;
}
fixEvent.stopPropagation = function() {
   this.cancelBubble = true;
}

// This little snippet fixes the problem that the onload attribute on the body-element will overwrite
// previous attached events on the window object for the onload event
if (!window.addEventListener) {
   document.onreadystatechange = function() {
      if (window.onload && window.onload != handleEvent) {
         addEvent(window, 'load', window.onload);
         window.onload = handleEvent;
      }
   }
}

// end Dean Edwards stuff

function invite(e) {
   e = e || fixEvent(window.event);
   if (!e) return;
   var h = 400;
   var w = 500;
   var LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
   var TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
   var newwindow = window.open(this.href, "Invite", "height="+h+",width="+w+",status=no,toolbar=no,location=no,resizeable,top="+TopPosition+",left="+LeftPosition);
   if (window.focus) newwindow.focus();
   e.preventDefault();
}

function init() {
   if (!document.getElementById && !document.createElement) return;
   var staf = document.getElementById("invite");
   if (staf) addEvent(staf, 'click', invite);
   var popup = document.getElementById("invitePopup");
   if (popup) {
      var sendForms = document.getElementsByTagName('form');
      if (sendForms.length > 0) {
         var url = document.getElementById('url');
         url.value = window.opener.location.href;
      }
      var close = document.getElementById("close");
      if (close) {
         var para = document.createElement("p");
         para.appendChild(document.createTextNode('['));
         var anchor = document.createElement("a");
         anchor.href = '#';
         addEvent(anchor, 'click', function() {window.close(); });
         anchor.appendChild(document.createTextNode('Close window')); 
         para.appendChild(anchor);
         para.appendChild(document.createTextNode(']'));
         close.parentNode.insertBefore(para, close.nextSibling);
      }
   }
}

addEvent(window, 'load', init);