//instead of getElementById
function $(ID){
	if(document.getElementById){
		return document.getElementById(ID);
	}
}


/** adds an event handler to an event listener **/
function addEventLstn(obj, evType, fn){ 
	if(!obj){
		throw(this.addEventLstn.caller);
	}
	
	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; 
	} 
}

//the inverse of the above
function removeEventLstn(obj, evType, fn){
	if (obj.removeEventListener){ 
		obj.removeEventListener(evType, fn, false); 
		return true; 
	} else if (obj.detachEvent){ 
		var r = obj.detachEvent("on"+evType, fn); 
		return r; 
	} else { 
		return false; 
	} 
}


function applyFilters(body) {
	body = body.replace(/&/gi, "&");
    body = body.replace(/</gi, "&lt;");
    body = body.replace(/>/gi, "&gt;");
    body = body.replace(/\n/gi, "<br>");
    // text style
    body = body.replace(/\[b\]/gi, "<b>");
    body = body.replace(/\[\/b\]/gi, "</b>");
    body = body.replace(/\[i\]/gi, "<i>");
    body = body.replace(/\[\/i\]/gi, "</i>");
    body = body.replace(/\[u\]/gi, "<u>");
    body = body.replace(/\[\/u\]/gi, "</u>");
    
    //[mconstantin 21.05.2009] - delete urls
  	url_arr = body.match(/http:\/\/[\S]+|www\.[\S]+/gi);
	if (url_arr != null)
	{
		for (i=0; i<url_arr.length; i++)
		{
			body = body.replace(url_arr[i], '%__' +(i*5+7)+ '__%');
		}
	}
	//[mconsatntin]
        
    // Emoticons
    //body = body.replace(/:-\?/gi,  "<img src='emoticons/y_think.gif'>");			// :-? think
    //body = body.replace(/>:\)/gi,  "<img src='emoticons/y_devilish.gif'>");			// >:) devilish
    body = body.replace(/:\)\)/gi, "<img src='emoticons/y_laugh.gif'>");			// :)) laugh :^O :^0
    body = body.replace(/\<lol\>/gi, "<img src='emoticons/y_laugh.gif'>");			// laugh 
    body = body.replace(/:\(\(/gi, "<img src='emoticons/y_cry.gif'>");				// :(( cry :_|
    body = body.replace(/:\)/gi,   "<img src='emoticons/m_happy.gif'>");			// :) :-) happy
    body = body.replace(/:-\)/gi,  "<img src='emoticons/m_happy.gif'>");
    body = body.replace(/:\(/gi,   "<img src='emoticons/m_sad.gif'>");				// :( :-( sad
    body = body.replace(/:-\(/gi,  "<img src='emoticons/m_sad.gif'>");
    body = body.replace(/;\)/gi,   "<img src='emoticons/m_wink.gif'>");				// ;) ;-) wink
    body = body.replace(/;-\)/gi,  "<img src='emoticons/m_wink.gif'>");
    body = body.replace(/:D/gi,    "<img src='emoticons/m_biggrin.gif'>");			// :D :-D grin
    body = body.replace(/:-D/gi,   "<img src='emoticons/m_biggrin.gif'>");
    body = body.replace(/:\//gi,   "<img src='emoticons/y_confused.gif'>");			// :/ :-/ confused ?:|
    body = body.replace(/X\(/gi,   "<img src='emoticons/m_angry.gif'>");			// X( X-( angry
    body = body.replace(/X-\(/gi,  "<img src='emoticons/m_angry.gif'>");
    //body = body.replace(/=;/gi,    "<img src='emoticons/y_talktothehand.gif'>");	// =; talktothehand
    body = body.replace(/:-?[pP]/gi,    "<img src='emoticons/y_tongue.gif'>");	// :P tongue
    
    //[mconstantin 21.05.2009] - add urls
	if (url_arr != null)
	{
		for (i=0; i<url_arr.length; i++)
		{
			body = body.replace('%__' +(i*5+7)+ '__%', url_arr[i]);
		}
	}
  	//[mconstantin]
    
    return body;
}


// Override the default trim method of String.
String.prototype.trim = function() {
  var text = this;
  var start = 0;
  var end = text.length;
  var display = "";
  for (var i=0; i<text.length; i++) {
    display += text.charCodeAt(i) + " ";
  }
  for (var i=0; i<text.length; i++) {
    var code = text.charCodeAt(i);
    if (code >= 33) { start = i; break; }
    else { start++; }
  }
  for (var i=text.length; i>start; i--) {
    var code = text.charCodeAt(i-1);
    if (code >= 33) { end = i; break; }
  }
  return text.substring(start, end);
}
// variable to tell whether or not a form has been clicked
var clicked = false;

function allowClick() {
  if (!clicked) { clicked = true; return true; }
  return false;
}

// Sequence for open window names
var windowNameSeq = 0;

// Array of all open windows
var windows = new Array();

// Checks to see if a window exists
function windowExists(name) {
  for (var i=0; i<windows.length; i++) {
    // IE needs a try/catch here for to avoid an access violation on windows[i].name in some cases.
    try {
      if (windows[i].name==name) { return true; }
    }
    catch (exception) {}
  }
  return false;
}

// Returns the window object - returns nothing if not found.
function getWindow(name) {
  for (var i = 0; i < windows.length; i++) {
    try { if (windows[i].name==name) { return windows[i]; } }
    catch (exception) {}
  }
}

function removeWindow(name) {
  for (var i=0; i<windows.length; i++) {
    try { if (windows[i].name == name) { windows.splice(i,1); return; } }
    catch (exception) {}
  }
}

// Open a window given its unique name, url, width and height.
function pushWin(name, url, width, height) {
  var defaultOptions = "location=yes,status=yes,toolbar=no,personalbar=no,menubar=no,directories=no,";
  defaultOptions += "scrollbars=yes,resizable=yes,";
  defaultOptions += "width=" + width + ",height=" + height;
  launchWinWithOptions(name, url, defaultOptions);
}

// Open a window given its unique name, url, width and height.
function launchWin(name, url, width, height) {
  var winleft = (screen.width - width)/2;
  var winUp = (screen.height - height)/2;
  var defaultOptions = "location=no,status=no,toolbar=no,personalbar=no,menubar=no,directories=no,";
  defaultOptions += "scrollbars=no,resizable=no,top=" + winUp + ",left=" + winleft + ",";
  defaultOptions += "width=" + width + ",height=" + height;
  launchWinWithOptions(name, url, defaultOptions);
}

// Open a window with given name, url, and options list
function launchWinWithOptions(name, url, options) {
  if (! windowExists(name)) {
    var winVar = window.open(url, name, options);
    windows[windows.length] = winVar;
    return winVar;
  }
  else {
    var theWin = getWindow(name);
    theWin.focus();
  }
}

function getTopLevelWindow() {
  var win = window;
  if (win.parent==win) { return win; }
  while (win.parent!=win) { win = window.parent.window; }
  return win;
}

// Close the current window object
function closeWin(win) { win.close(); }

// Handle closing of the current window
function handleClose(message) {
  if (confirm(message)) {
    removeWindow(getTopLevelWindow().name);
    closeWin(getTopLevelWindow());
    return true;
  }
  else { return false; }
}

// Handle closing of the current window
function confirmCancel(message) {
  if (confirm(message)) {
    getTopLevelWindow().location.href = 'userinfo.jsp';
    return true;
  }
  else { return false; }
}

function confirmCancelAndClose(message) {
  if (confirm(message)) {
    getTopLevelWindow().location.href = 'userinfo.jsp';
    getTopLevelWindow().close();
    return true;
  }
  else { return false; }
}

// Handle closing of the current window
function confirmCancel(message, workgroup, chatID) {
  if (confirm(message)) {
    getTopLevelWindow().location.href = 'userinfo.jsp?workgroup=' + workgroup +'&chatID='+chatID;
    return true;
  }
  else return false;
}

function closeAll() {
  removeWindow(getTopLevelWindow().name);
  closeWin(getTopLevelWindow());
}

// Opens the help window:
function launchHelpWin() {
  var win = launchWin('helpwin', 'helpwin.jsp', 550, 350);
}

// Hide a DIV
function hide(divId) {
  if (document.layers) {  document.layers[divId].visibility = 'hide'; }
  else if (document.all) { document.all[divId].style.visibility = 'hidden'; }
  else if (document.getElementById) {
    document.getElementById(divId).style.visibility = 'hidden';
  }
}

// Show a DIV
function show(divId) {
  if (document.layers) { document.layers[divId].visibility = 'show'; }
  else if (document.all) { document.all[divId].style.visibility = 'visible'; }
  else if (document.getElementById) {
    document.getElementById(divId).style.visibility = 'visible';
  }
}

function getDiv(divID) {
  if (document.layers) { return document.layers[divID]; }
  else if (document.all) { return document.all[divID]; }
  else if (document.getElementById) { return document.getElementById(divID); }
}

function getDivByDoc(divID, doc) {
  if (doc.layers) { return doc.layers[divID]; }
  else if (doc.all) { return doc.all[divID]; }
  else if (doc.getElementById) { return doc.getElementById(divID); }
}

// TODO
function showTypingIndicator(flag) {
  if (flag) {
    //put the text in the div
  }
  else {
    //blank out the div
  }
}

function informConnectionClosed() {
  alert('Your support session has ended, you will be redirected to the transcript page.');
  parent.location.href = 'transcriptmain.jsp';
}

function addChatText(yakWin, from, text) {
  text = applyFilters(text);

  // The div to write to:
  var yakDiv = yakWin.document.getElementById('ytext');

  // This will be an announcement if there is no from passed in
  var isAnnouncement = (from == "");

  // Create a new span node in the yakDiv. Record the num of nodes right now - used later
  // to see if the node was really added :
  var numChildren = yakDiv.childNodes.length;
  var nameSpan = document.createElement("span");
  var textSpan = document.createElement("span");
  if (isAnnouncement) {
    nameSpan.setAttribute("class", "chat-announcement");
    textSpan.setAttribute("class", "chat-announcement");
  }
  else { textSpan.setAttribute("class", "text"); }
  // add another span containing the username if this is not an announcement:
  var fromIsCurrentUser = false;
  if (!isAnnouncement) {
    // is the from the same as the current user?
    fromIsCurrentUser = (nickname == from);
    if (fromIsCurrentUser) { nameSpan.setAttribute("class", "client-name"); }
    else { nameSpan.setAttribute("class", "operator-name"); }
  }
  var chatLineDiv = document.createElement("div");
  chatLineDiv.setAttribute("class", "chat-line");

  var appendFailed = false;
  try {
    if (!isAnnouncement) {
      nameSpan.innerHTML = from + ": ";
      chatLineDiv.appendChild(nameSpan);
    }
    textSpan.innerHTML = text;
    chatLineDiv.appendChild(textSpan);
    yakDiv.appendChild(chatLineDiv);
  }
  catch (exception) { appendFailed = true; }
  if (! appendFailed) {
    // Make sure the browser appended:
    appendFailed = (numChildren==yakDiv.childNodes.length);
  }

  if (appendFailed) {
    var inn = yakDiv.innerHTML;
    inn += "<div class=\"chat-line\">";
    if (!isAnnouncement) {
      inn += "<span class=\"";
      if (isAnnouncement) inn+="chat-announcement";
      else
        if (fromIsCurrentUser) inn+="client-name";
        else inn+="operator-name";
      inn += "\">" + from + " : </span>";
      //yakDiv.innerHTML = inn;
    }
    //var inn = yakDiv.innerHTML;
    inn += "<span class=\"";
    inn += (isAnnouncement ? "chat-announcement\">" : "chat_text\">");
    inn += text + "</span></div>";
    yakDiv.innerHTML = inn;
  }
  else {
    //yakDiv.appendChild(document.createElement("br"));
  }
}

function scrollYakToEnd(yakWin) {
  var endDiv = yakWin.document.getElementById('enddiv');
  yakWin.scrollTo(0, endDiv.offsetTop);
}