/*
 * $Id: wclib.js 7691 2009-07-23 01:21:58Z matt $
 * Copyright 2005 - 2009 The Citadel Team
 * Licensed under the GPL V3
 *
 * JavaScript function library for WebCit.
 *
 */


var browserType;
var room_is_trash = 0;

var currentlyExpandedFloor = null;
var roomlist = null;

var _switchToRoomList = "switch to room list";
var _switchToMenu = "switch to menu";

var currentDropTarget = null;

var supportsAddEventListener = (!!document.addEventListener);
var today = new Date();

var wc_log = "";
var is_ie6 = false;
if (document.all) {browserType = "ie"}
if (window.navigator.userAgent.toLowerCase().match("gecko")) {
	browserType= "gecko";
}
var ns6=document.getElementById&&!document.all;
Event.observe(window, 'load', ToggleTaskDateOrNoDateActivate);
Event.observe(window, 'load', taskViewActivate);
Event.observe(window, 'load', fixbanner);
Event.observe(window, 'load', resizeViewport);
Event.observe(window, 'resize', resizeViewport);
//document.observe("dom:loaded", setupPrefEngine);
document.observe("dom:loaded", setupIconBar);
document.observe('dom:loaded', function() { if (!!document.getElementById("ib_chat_launch")) { $('ib_chat_launch').observe('click', launchChat); } });
function CtdlRandomString()  {
	return((Math.random()+'').substr(3));
}
function strcmp ( str1, str2 ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Waldo Malqui Silva
    // +      input by: Steve Hilder
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    revised by: gorthaur
    // *     example 1: strcmp( 'waldo', 'owald' );
    // *     returns 1: 1
    // *     example 2: strcmp( 'owald', 'waldo' );
    // *     returns 2: -1
 
    return ( ( str1 == str2 ) ? 0 : ( ( str1 > str2 ) ? 1 : -1 ) );
}

function emptyElement(element) {
  childNodes = element.childNodes;
  for(var i=0; i<childNodes.length; i++) {
    try {
    element.removeChild(childNodes[i]);
    } catch (e) {
      WCLog(e+"|"+e.description);
    }
  }
}
/** Implements superior internet explorer 'extract all child text from element' feature'. Falls back on buggy, patent violating standardized method */
function getTextContent(element) {
  if (element.textContent == undefined) {
    return element.innerText;
  }
  return element.textContent;
}
/** Same reasons as above */
function setTextContent(element, textContent) {
  if(element.textContent == undefined) {
    element.innerText = textContent;
  } else {
  element.textContent = textContent;
  }
}

// We love string tokenizers.
function extract_token(source_string, token_num, delimiter) {
	var i = 0;
	var extracted_string = source_string;

	if (token_num > 0) {
		for (i=0; i<token_num; ++i) {
			var j = extracted_string.indexOf(delimiter);
			if (j >= 0) {
				extracted_string = extracted_string.substr(j+1);
			}
		}
	}

	j = extracted_string.indexOf(delimiter);
	if (j >= 0) {
		extracted_string = extracted_string.substr(0, j);
	}

	return extracted_string;
}

function CtdlSpawnContextMenu(event, source) {
  // remove any existing menus
  disintergrateContextMenus(null);
  var x = event.clientX-10; // cut a few pixels out so our mouseout works right
  var y = event.clientY-10;
  var contextDIV = document.createElement("div");
  contextDIV.setAttribute("id", "ctdlContextMenu");
  document.body.appendChild(contextDIV);
  var sourceChildren = source.childNodes;
  for(var j=0; j<sourceChildren.length; j++) {
    contextDIV.appendChild(sourceChildren[j].cloneNode(true));
  }
  var leftRule = "left: "+x+"px;";
  contextDIV.setAttribute("style", leftRule);
  contextDIV.setAttribute("actual", leftRule);
  contextDIV.style.top = y+"px";
  contextDIV.style.display = "block";
  $(contextDIV).observe('mouseout',disintergrateContextMenus);
}
function disintergrateContextMenus(event) {
  var contextMenu = document.getElementById("ctdlContextMenu");
  if (contextMenu) {
    contextMenu.parentNode.removeChild(contextMenu);
  }
  Event.stopObserving(document,'click',disintergrateContextMenus);
}
// This code handles the popups for important-messages.
function hide_imsg_popup() {
	if (browserType == "gecko") {
		document.poppedLayer = eval('document.getElementById(\'important_message\')');
	}
	else if (browserType == "ie") {
		document.poppedLayer = eval('document.all[\'important_message\']');
	}
	else {
		document.poppedLayer = eval('document.layers[\'`important_message\']');
	}

	document.poppedLayer.style.visibility = "hidden";
}


// This function activates the ajax-powered recipient autocompleters on the message entry screen.
function activate_entmsg_autocompleters() {
	new Ajax.Autocompleter('cc_id', 'cc_name_choices', 'cc_autocomplete', {} );
	new Ajax.Autocompleter('bcc_id', 'bcc_name_choices', 'bcc_autocomplete', {} );
	new Ajax.Autocompleter('recp_id', 'recp_name_choices', 'recp_autocomplete', {} );
}

function setupIconBar() {
  if (!document.getElementById("switch")) {
      return;
    }
  _switchToRoomList = getTextContent(document.getElementById("rmlist_template"));
  _switchToMenu = getTextContent(document.getElementById("mnlist_template"));
  var switchSpan = document.getElementById("switch").firstChild;
  if (switchSpan != null) {
    setTextContent(switchSpan, _switchToRoomList);
    $(switchSpan).observe('click', changeIconBarEvent);
    var currentView = ctdlLocalPrefs.readPref("iconbar_view");
    if (currentView != null) {
      switchSpan.ctdlSwitchIconBarTo = currentView;
      changeIconBar(switchSpan);
    } else {
      switchSpan.ctdlSwitchIconBarTo = "rooms";
    }
  }
  var online_users = document.getElementById("online_users");
  if (online_users.offsetParent != null && online_users.offsetTop > 0) {
    new Ajax.PeriodicalUpdater('online_users', 'do_template?template=wholist_section', {method: 'get', frequency: 30});
  }
}
function changeIconBarEvent(event) {
  changeIconBar(event.target);
}
function changeIconBar(target) {
  var switchTo = target.ctdlSwitchIconBarTo;
  WCLog("Changing to: " + switchTo);
  ctdlLocalPrefs.setPref("iconbar_view", target.ctdlSwitchIconBarTo);  
  if (switchTo == "rooms") {
    switch_to_room_list();
    setTextContent(target, _switchToMenu);
    target.ctdlSwitchIconBarTo = "menu";
  } else {
    switch_to_menu_buttons();
    setTextContent(target, _switchToRoomList);
    target.ctdlSwitchIconBarTo = "rooms";
  }
}
function switch_to_room_list() {
  var roomlist = document.getElementById("roomlist");
  var summary = document.getElementById("iconbar_menu");
  if (!rooms || !floors || !roomlist) {
    FillRooms(IconBarRoomList);
  }
  roomlist.className = roomlist.className.replace("hidden","");
  summary.className += " hidden";
}

function switch_to_menu_buttons() {
  if (roomlist != null) {
    roomlist.className += "hidden";
  }
  var iconbar = document.getElementById("iconbar_menu");
  iconbar.className = iconbar.className.replace("hidden","");
  var roomlist = document.getElementById("roomlist");
  roomlist.className += " hidden";
}
function IconBarRoomList() {
  var currentExpanded = ctdlLocalPrefs.readPref("rooms_expanded");
  var curRoomName = "";
  if (document.getElementById("rmname")) {
    curRoomName = getTextContent(document.getElementById("rmname"));
  }
  currentDropTargets = new Array();
  var iconbar = document.getElementById("iconbar");
  roomlist = document.getElementById("roomlist");
  var ul = document.createElement("ul");
  roomlist.appendChild(ul);
  // Add mailbox, because they are special
  var mailboxLI = document.createElement("li");
  ul.appendChild(mailboxLI);
  var mailboxSPAN = document.createElement("span");
  var _mailbox = getTextContent(document.getElementById("mbox_template"));
  mailboxSPAN.appendChild(document.createTextNode(_mailbox));
  $(mailboxSPAN).observe('click', expandFloorEvent);
  mailboxLI.appendChild(mailboxSPAN);
  mailboxLI.className = "floor";
  var mailboxUL = document.createElement("ul");
  mailboxLI.appendChild(mailboxUL);
  var mailboxRooms = GetMailboxRooms();
  for(var i=0; i<mailboxRooms.length; i++) {
    var room = mailboxRooms[i];
    currentDropTargets.push(addRoomToList(mailboxUL, room, curRoomName));
  }
  if (currentExpanded != null && currentExpanded == _mailbox ) {
    expandFloor(mailboxSPAN);
  }
  for(var a=0; a<floors.length; a++) {
    var floor = floors[a];
    var floornum = floor[0];
    var name = floor[1];
    var floorLI = document.createElement("li");
    ul.appendChild(floorLI);
    var floorSPAN = document.createElement("span");
    floorSPAN.appendChild(document.createTextNode(name));
    $(floorSPAN).observe('click', expandFloorEvent);
    floorLI.appendChild(floorSPAN);
    floorLI.className = "floor";
    var floorUL = document.createElement("ul");
    floorLI.appendChild(floorUL);
    var roomsForFloor = GetRoomsByFloorNum(floornum);
    for(var b=0; b<roomsForFloor.length; b++) {
      var room = roomsForFloor[b];
      currentDropTargets.push(addRoomToList(floorUL, room, curRoomName));
    }
    if (currentExpanded != null && currentExpanded == name) {
      expandFloor(floorSPAN);
    }
  }
}

function addRoomToList(floorUL,room, roomToEmphasize) {
  var roomName = room[RN_ROOM_NAME];
  var flag = room[RN_ROOM_FLAG];
  var curView = room[RN_CUR_VIEW];
  var view = room[RN_DEF_VIEW];
  var isMailBox = ((flag & QR_MAILBOX) == QR_MAILBOX);
  var hasNewMsgs = ((curView & UA_HASNEWMSGS) == UA_HASNEWMSGS);
  var roomLI = document.createElement("li");
  var roomA = document.createElement("a");
  roomA.setAttribute("href","dotgoto?room="+roomName);
  roomA.appendChild(document.createTextNode(roomName));
  roomLI.appendChild(roomA);
  floorUL.appendChild(roomLI);
  var className = "room ";
  if (view == VIEW_MAILBOX) {
    className += "room-private"
  } else if (view == VIEW_ADDRESSBOOK) {
    className += "room-addr";
  } else if (view == VIEW_CALENDAR || view == VIEW_CALBRIEF) {
    className += "room-cal";
  } else if (view == VIEW_TASKS) {
    className += "room-tasks";
  } else if (view == VIEW_NOTES) {
    className += "room-notes";
  } else {
    className += "room-chat";
  }
  if (hasNewMsgs) {
    className += " room-newmsgs";
  }
  if (roomName == roomToEmphasize) {
    className += " room-emphasized";
  }
  roomLI.setAttribute("class", className);
  roomA.dropTarget = true;
  roomA.dropHandler = roomListDropHandler;
  return roomLI;
}

function roomListDropHandler(target, dropped) {
  if (dropped.getAttribute("citadel:msgid")) {
    var room = getTextContent(target);
    var msgIds = "";
    for(msgId in currentlyMarkedRows) { //defined in summaryview.js
      msgIds += ","+msgId;
    }
    var mvCommand = "g_cmd=MOVE " + msgIds + "|"+room+"|0";
    new Ajax.Request('ajax_servcmd', {
      method: 'post',
	  parameters: mvCommand,
	  onComplete: deleteAllMarkedRows()});
    } 
}
function expandFloorEvent(event) {
  expandFloor(event.target);
}
function expandFloor(target) {
  if (target.nodeName.toLowerCase() != "span") {
    return; // ignore clicks on child UL
  }
  ctdlLocalPrefs.setPref("rooms_expanded", target.firstChild.nodeValue);
  var parentUL = target.parentNode;
  if (currentlyExpandedFloor != null) {
    currentlyExpandedFloor.className = currentlyExpandedFloor.className.replace("floor-expanded","");
  }
  parentUL.className = parentUL.className + " floor-expanded";
  currentlyExpandedFloor = parentUL;
}

// These functions handle moving sticky notes around the screen by dragging them

var uid_of_note_being_dragged = 0;
var saved_cursor_style = 'default';
var note_was_dragged = 0;

function NotesDragMouseUp(evt) {
	document.onmouseup = null;
	document.onmousemove = null;
	if (document.layers) {
		document.releaseEvents(Event.MOUSEUP | Event.MOUSEMOVE);
	}

	d = $('note-' + uid_of_note_being_dragged);
	d.style.cursor = saved_cursor_style;

	// If any motion actually occurred, submit an ajax http call to record it to the server
	if (note_was_dragged > 0) {
		p = 'note_uid=' + uid_of_note_being_dragged
			+ '&left=' + d.style.left
			+ '&top=' + d.style.top
			+ '&r=' + CtdlRandomString();
		new Ajax.Request(
			'ajax_update_note',
			{
				method: 'post',
				parameters: p
			}
		);
	}

	uid_of_note_being_dragged = '';
	return true;
}

function NotesDragMouseMove(evt) {
	x = (ns6 ? evt.clientX : event.clientX);
	x_increment = x - saved_x;
	y = (ns6 ? evt.clientY : event.clientY);
	y_increment = y - saved_y;

	// Move the div
	d = $('note-' + uid_of_note_being_dragged);

	divTop = parseInt(d.style.top);
	divLeft = parseInt(d.style.left);

	d.style.top = (divTop + y_increment) + 'px';
	d.style.left = (divLeft + x_increment) + 'px';

	saved_x = x;
	saved_y = y;
	note_was_dragged = 1;
	return true;
}


function NotesDragMouseDown(evt, uid) {
	saved_x = (ns6 ? evt.clientX : event.clientX);
	saved_y = (ns6 ? evt.clientY : event.clientY);
	document.onmouseup = NotesDragMouseUp;
	document.onmousemove = NotesDragMouseMove;
	if (document.layers) {
		document.captureEvents(Event.MOUSEUP | Event.MOUSEMOVE);
	}
	uid_of_note_being_dragged = uid;
	d = $('note-' + uid_of_note_being_dragged);
	saved_cursor_style = d.style.cursor;
	d.style.cursor = 'move';
	return false;		// disable the default action
}


// Called when the user clicks on the palette icon of a sticky note to change its color.
// It toggles the color selector visible or invisible.

function NotesClickPalette(evt, uid) {
	uid_of_note_being_colored = uid;
	d = $('palette-' + uid_of_note_being_colored);

	if (d.style.display) {
		if (d.style.display == 'none') {
			d.style.display = 'block';
		}
		else {
			d.style.display = 'none';
		}
	}
	else {
		d.style.display = 'block';
	}

	return true;
}


// Called when the user clicks on one of the colors in an open color selector.
// Sets the desired color and then closes the color selector.

function NotesClickColor(evt, uid, red, green, blue, notecolor, titlecolor) {
	uid_of_note_being_colored = uid;
	palette_button = $('palette-' + uid_of_note_being_colored);
	note_div = $('note-' + uid_of_note_being_colored);
	titlebar_div = $('titlebar-' + uid_of_note_being_colored);

	// alert('FIXME red=' + red + ' green=' + green + ' blue=' + blue);

	note_div.style.backgroundColor = notecolor;
	titlebar_div.style.backgroundColor = titlecolor;
	palette_button.style.display = 'none';

	// submit an ajax http call to record it to the server
	p = 'note_uid=' + uid_of_note_being_colored
		+ '&red=' + red
		+ '&green=' + green
		+ '&blue=' + blue
		+ '&r=' + CtdlRandomString();
	new Ajax.Request(
		'ajax_update_note',
		{
			method: 'post',
			parameters: p
		}
	);
}




// These functions handle resizing sticky notes by dragging the resize handle

var uid_of_note_being_resized = 0;
var saved_cursor_style = 'default';
var note_was_resized = 0;

function NotesResizeMouseUp(evt) {
	document.onmouseup = null;
	document.onmousemove = null;
	if (document.layers) {
		document.releaseEvents(Event.MOUSEUP | Event.MOUSEMOVE);
	}

	d = $('note-' + uid_of_note_being_resized);
	d.style.cursor = saved_cursor_style;

	// If any motion actually occurred, submit an ajax http call to record it to the server
	if (note_was_resized > 0) {
		p = 'note_uid=' + uid_of_note_being_resized
			+ '&width=' + d.style.width
			+ '&height=' + d.style.height
			+ '&r=' + CtdlRandomString();
		new Ajax.Request(
			'ajax_update_note',
			{
				method: 'post',
				parameters: p
			}
		);
	}

	uid_of_note_being_resized = '';
	return false;		// disable the default action
}

function NotesResizeMouseMove(evt) {
	x = (ns6 ? evt.clientX : event.clientX);
	x_increment = x - saved_x;
	y = (ns6 ? evt.clientY : event.clientY);
	y_increment = y - saved_y;

	// Move the div
	d = $('note-' + uid_of_note_being_resized);

	divTop = parseInt(d.style.height);
	divLeft = parseInt(d.style.width);

	d.style.height = (divTop + y_increment) + 'px';
	d.style.width = (divLeft + x_increment) + 'px';

	saved_x = x;
	saved_y = y;
	note_was_resized = 1;
	return false;		// disable the default action
}


function NotesResizeMouseDown(evt, uid) {
	saved_x = (ns6 ? evt.clientX : event.clientX);
	saved_y = (ns6 ? evt.clientY : event.clientY);
	document.onmouseup = NotesResizeMouseUp;
	document.onmousemove = NotesResizeMouseMove;
	if (document.layers) {
		document.captureEvents(Event.MOUSEUP | Event.MOUSEMOVE);
	}
	uid_of_note_being_resized = uid;
	d = $('note-' + uid_of_note_being_resized);
	saved_cursor_style = d.style.cursor;
	d.style.cursor = 'move';
	return false;		// disable the default action
}


function DeleteStickyNote(evt, uid, confirmation_prompt) {
	uid_of_note_being_deleted = uid;
	d = $('note-' + uid_of_note_being_deleted);

	if (confirm(confirmation_prompt)) {
		new Effect.Puff(d);

		// submit an ajax http call to delete it on the server
		p = 'note_uid=' + uid_of_note_being_deleted
			+ '&deletenote=yes'
			+ '&r=' + CtdlRandomString();
		new Ajax.Request(
			'ajax_update_note',
			{
				method: 'post',
				parameters: p
			}
		);
	}
}

function ctdl_ts_getInnerText(el) {
	if (typeof el == "string") return el;
	if (typeof el == "undefined") { return el };
	if (el.innerText) return el.innerText;	//Not needed but it is faster
	var str = "";
	
	var cs = el.childNodes;
	var l = cs.length;
	for (var i = 0; i < l; i++) {
		switch (cs[i].nodeType) {
			case 1: //ELEMENT_NODE
				str += ts_getInnerText(cs[i]);
				break;
			case 3:	//TEXT_NODE
				str += cs[i].nodeValue;
				break;
		}
	}
	return str;
}


// Place a gradient loadscreen on an element, e.g to use before Ajax.updater
function CtdlLoadScreen(elementid) {
var elem = document.getElementById(elementid);
elem.innerHTML = "<div align=center><br><table border=0 cellpadding=10 bgcolor=\"#ffffff\"><tr><td><img src=\"static/throbber.gif\" /><font color=\"#AAAAAA\">&nbsp;&nbsp;Loading....</font></td></tr></table><br /></div>";
}



// Pop open the address book (target_input is the INPUT field to populate)

function PopOpenAddressBook(target_input) {
	$('address_book_popup').style.display = 'block';
	p = 'target_input=' + target_input + '&r=' + CtdlRandomString();
	new Ajax.Updater(
		'address_book_popup_middle_div',
		'display_address_book_middle_div',
		{
			method: 'get',
			parameters: p,
			evalScripts: true
		}
	);
}

function PopulateAddressBookInnerDiv(which_addr_book, target_input) {
	$('address_book_inner_div').innerHTML = "<div align=center><br><table border=0 cellpadding=10 bgcolor=\"#ffffff\"><tr><td><img src=\"static/throbber.gif\" /><font color=\"#AAAAAA\">&nbsp;&nbsp;Loading....</font></td></tr></table><br /></div>";
	p = 'which_addr_book=' + which_addr_book
	  + '&target_input=' + target_input
	  + '&r=' + CtdlRandomString();
	new Ajax.Updater(
		'address_book_inner_div',
		'display_address_book_inner_div',
		{
			method: 'get',
			parameters: p
		}
	);
}

// What happens when a contact is selected from the address book popup
// (populate the specified target)

function AddContactsToTarget(target, whichaddr) {
	while (whichaddr.selectedIndex != -1) {
		if (target.value.length > 0) {
			target.value = target.value + ', ';
		}
		target.value = target.value + whichaddr.value;
		whichaddr.options[whichaddr.selectedIndex].selected = false;
	}
}

// Respond to a meeting invitation
function RespondToInvitation(question_divname, title_divname, msgnum, cal_partnum, sc) {
	p = 'msgnum=' + msgnum + '&cal_partnum=' + cal_partnum + '&sc=' + sc ;
	new Ajax.Updater(title_divname, 'respond_to_request', { method: 'post', parameters: p } );
	Effect.Fade(question_divname, { duration: 0.5 });
}

// Handle a received RSVP
function HandleRSVP(question_divname, title_divname, msgnum, cal_partnum, sc) {
	p = 'msgnum=' + msgnum + '&cal_partnum=' + cal_partnum + '&sc=' + sc ;
	new Ajax.Updater(title_divname, 'handle_rsvp', { method: 'post', parameters: p } );
	Effect.Fade(question_divname, { duration: 0.5 });
}
/* var fakeMouse = document.createEvent("MouseEvents");
 fakeMouse.initMouseEvent("click", true, true, window, 
   0,0,0,0,0, false, false, false, false, 0, null); */
// TODO: Collapse into one function
function toggleTaskDtStart(event) {
	var checkBox = $('nodtstart');
	var checkBoxTime = $('dtstart_time_assoc');
	var dtstart = document.getElementById("dtstart");
	var dtstart_date = document.getElementById("dtstart_date");
	var dtstart_time = document.getElementById("dtstart_time");
	if (checkBox.checked) {
		dtstart_date.style.visibility = "hidden";
		dtstart_time.style.visibility = "hidden";
	} else {
		if (checkBoxTime.checked) {
			dtstart_time.style.visibility = "visible";
		} else {
			dtstart_time.style.visibility = "hidden";
		}
		dtstart_date.style.visibility = "visible";
		if (dtstart.value.length == 0)
			dtstart.dpck._initCurrentDate();
	}
}
function toggleTaskDue(event) {
	var checkBox = $('nodue');
	var checkBoxTime = $('due_time_assoc');
	var due = document.getElementById("due");
	var due_date = document.getElementById("due_date");
	var due_time = document.getElementById("due_time");
	if (checkBox.checked) {
		due_date.style.visibility = "hidden";
		due_time.style.visibility = "hidden";
	} else {
		if (checkBoxTime.checked) {
			due_time.style.visibility = "visible";
		} else {
			due_time.style.visibility = "hidden";
		}
		due_date.style.visibility = "visible";
		if (due.value.length == 0)
			due.dpck._initCurrentDate();
	}
}
function ToggleTaskDateOrNoDateActivate(event) {
	var dtstart = document.getElementById("nodtstart");
	if (dtstart != null) {
		toggleTaskDtStart(null);
		toggleTaskDue(null);
		$('nodtstart').observe('click', toggleTaskDtStart);
		$('dtstart_time_assoc').observe('click', toggleTaskDtStart);
		$('nodue').observe('click', toggleTaskDue);
		$('due_time_assoc').observe('click', toggleTaskDue);
	} 
}
function TaskViewGatherCategoriesFromTable() {
	var table = $('taskview');
	
}
function attachDatePicker(relative) {
	var dpck = new DatePicker({
	relative: relative,
	      language: 'en', //wclang.substr(0,2),
	      disableFutureDate: false,
	      dateFormat: [ ["yyyy", "mm", "dd"], "-"],
	      showDuration: 0.2
	});
	document.getElementById(relative).dpck = dpck; // attach a ref to it
}
function eventEditAllDay() {
	var allDayCheck = document.getElementById("alldayevent");
	var dtend_time = document.getElementById("dtend_time");
	var dtstart_time = document.getElementById("dtstart_time");
	if(allDayCheck.checked) {
		dtstart_time.style.visibility = "hidden";
		dtend_time.style.visibility = "hidden";
	} else {
		dtstart_time.style.visibility = "visible";
		dtend_time.style.visibility = "visible";
	}
}

// Functions which handle show/hide of various elements in the recurrence editor

function RecurrenceShowHide() {

	if ($('is_recur').checked) {
		$('rrule_div').style.display = 'block';
	}
	else {
		$('rrule_div').style.display = 'none';
	}

	if ($('freq_selector').selectedIndex == 4) {
		$('weekday_selector').style.display = 'block';
	}
	else {
		$('weekday_selector').style.display = 'none';
	}

	if ($('freq_selector').selectedIndex == 5) {
		$('monthday_selector').style.display = 'block';
	}
	else {
		$('monthday_selector').style.display = 'none';
	}

	if ($('rrend_count').checked) {
		$('rrcount').disabled = false;
	}
	else {
		$('rrcount').disabled = true;
	}

	if ($('rrend_until').checked) {
		$('rruntil').disabled = false;
	}
	else {
		$('rruntil').disabled = true;
	}

	if ($('rrmonthtype_mday').checked) {
		$('rrmday').disabled = false;
	}
	else {
		$('rrmday').disabled = true;
	}

	if ($('rrmonthtype_wday').checked) {
		$('rrmweek').disabled = false;
		$('rrmweekday').disabled = false;
	}
	else {
		$('rrmweek').disabled = true;
		$('rrmweekday').disabled = true;
	}

	if ($('freq_selector').selectedIndex == 6) {
		$('yearday_selector').style.display = 'block';
	}
	else {
		$('yearday_selector').style.display = 'none';
	}

	$('ymday').innerHTML = 'XXXX-' + $('dtstart').value.substr(5);
	$('rrmday').innerHTML = $('dtstart').value.substr(8);

	if ($('rryeartype_ywday').checked) {
		$('rrymweek').disabled = false;
		$('rrymweekday').disabled = false;
		$('rrymonth').disabled = false;
	}
	else {
		$('rrymweek').disabled = true;
		$('rrymweekday').disabled = true;
		$('rrymonth').disabled = true;
	}

}


// Enable or disable the 'check attendee availability' button depending on whether
// the attendees list is empty
function EnableOrDisableCheckButton()
{
	if ($('attendees_box').value.length == 0) {
		$('check_button').disabled = true;
	}
	else {
		$('check_button').disabled = false;
	}
}




function launchChat(event) {
window.open('chat', 'ctdl_chat_window', 'toolbar=no,location=no,directories=no,copyhistory=no,status=no,scrollbars=yes,resizable=yes');
}
// logger
function WCLog(msg) {
  if (!!window.console && !!console.log) {
    console.log(msg);
  } else if (!!window.opera && !!opera.postError) {
    opera.postError(msg);
  } else {
    wc_log += msg + "\r\n";
  }
}

function fixMissingCSSTable(elems) {
 if (elems[0] == null || elems[1] == null) {
    return;
  }
  if (elems[0].getStyle("display") != "table-cell") {
    var parentNode = elems[0].parentNode;
    var table = document.createElement("table");
    table.style.width = "100%";
    var tbody = document.createElement("tbody");
    table.appendChild(tbody);
    var tr = document.createElement("tr");
    tbody.appendChild(tr);
    parentNode.appendChild(table);
    for(var i=0; i<elems.length; i++) {
      parentNode.removeChild(elems[i]);
      var td = document.createElement("td");
      td.appendChild(elems[i]);
      tr.appendChild(td);
    }
  }
}
function fixbanner() {
  // Use prototype api methods here
  var elems = [$('room_banner'),$('actiondiv')];
  fixMissingCSSTable(elems);
  if (!is_ie6) {
    Event.observe(window, 'resize', makeContentScrollable);
    makeContentScrollable();
  }
}
function makeContentScrollable() {
if (document.getElementById("banner")
      && document.getElementById("content") 
      && !document.getElementById("summary_view")) {
  WCLog("makeContentScrollable");
    document.body.style.overflowY="hidden";
    var global = $("global");
    global.className += "scrollable";
    var content = document.getElementById("content");
    var banner = document.getElementById("banner");
    var bannerHeight = banner.offsetHeight;
    banner.style.width="100%";
    var bannerPercent = (bannerHeight/document.viewport.getHeight())*100;
    //banner.style.height=bannerPercent+"%";
    content.style.overflowY="scroll";
    //content.style.top=bannerPercent+"%";
    content.style.height=(100-bannerPercent)+"%";
    content.style.right="0px";
  }
}
function fixOffsetBanner() {
  var banner = document.getElementById("banner");
  if (banner.offsetLeft > 0) {
    var viewportWidth = document.viewport.getWidth();
    var iconbarWidth = document.getElementById("iconbar").offsetWidth;
    var contentDiv = document.getElementById("content");
    var newContentWidth = viewportWidth-iconbarWidth;
    contentDiv.style.width = newContentWidth+"px";
  }
}
/** Attempt to stop overflowing in x-axis in IE6 */
function resizeViewport() {
  var documentWidth = 0;
  var viewportWidth = document.viewport.getWidth();
  var iconbar = $('iconbar');
  var global = $('global');
  if (iconbar == null || global == null || document.documentElement == null) {
    return;
  }
  if (typeof window.offsetWidth != 'undefined') {
    documentWidth = window.offsetWidth;
  } else {
    documentWidth = document.documentElement.offsetWidth;
  }
  if (documentWidth > viewportWidth) {
    WCLog("resizeViewport");
    document.documentElement.style.width = viewportWidth+"px";
    document.documentElement.style.overflowX = "hidden";
    //viewportWidth = 0.98 * viewportWidth;
    var newIconBarSize = 0.16 * viewportWidth;
    var newContentSize = viewportWidth - newIconBarSize;
    iconbar.style.width = newIconBarSize+"px";
    global.style.width = newContentSize+"px";
  }
}