function initJavaScript() {
document.forms['chatForm'].elements['chatbarText'].setAttribute('autocomplete','off'); // hack firefox
checkStatus(''); // controleert status
checkName(); // controleert naam
receiveChatText(); // chatdataoverdracht
receiveUsers(); // online leden
}

// haalt eerste chatberichten op
function receiveChatText() {
if (httpReceiveChat.readyState == 4 || httpReceiveChat.readyState == 0) {
  httpReceiveChat.open("GET",GetChaturl + '?lastID=' + lastID + '&rand='+Math.floor(Math.random() * 1000000), true);
   httpReceiveChat.onreadystatechange = handlehHttpReceiveChat;
  httpReceiveChat.send(null);
}
}

// verbinding met database voor nieuwe data
function handlehHttpReceiveChat() {
 if (httpReceiveChat.readyState == 4) {
   results = httpReceiveChat.responseText.split('---'); // velden worden gedeeld met ---
   if (results.length > 2) {
   for(i=0;i < (results.length-1);i=i+3) { //
    insertNewContent(results[i+1],results[i+2]); // nieuwe chatberichten plaatsen
   }
   lastID = results[results.length-4];
   }
   setTimeout('receiveChatText();',1000); // nieuwe data ophalen (1 seconde = 1000)
 }
}

// plaatst nieuwe data op pagina
function insertNewContent(liName,liText) {
insertO = document.getElementById("outputList");
oLi = document.createElement('li');
oSpan = document.createElement('span');
oSpan.setAttribute('className','name'); // IE hack
oSpan.setAttribute('class','name');
oName = document.createTextNode(liName+': ');
oText = document.createTextNode(liText);
oSpan.appendChild(oName);
oLi.appendChild(oSpan);
oLi.appendChild(oText);
insertO.insertBefore(oLi, insertO.firstChild);
}

// slaat nieuwe chatberichten op op server
function sendComment() {
currentChatText = document.forms['chatForm'].elements['chatbarText'].value;
if (currentChatText != '' & (httpSendChat.readyState == 4 || httpSendChat.readyState == 0)) {
currentName = document.forms['chatForm'].elements['name'].value;
param = 'n='+ currentName+'&c='+ currentChatText;
httpSendChat.open("POST", SendChaturl, true);
httpSendChat.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
  httpSendChat.onreadystatechange = handlehHttpSendChat;
  httpSendChat.send(param);
  document.forms['chatForm'].elements['chatbarText'].value = '';
} else {
setTimeout('sendComment();',1000);
}
}

// afhandeling chatberichtzending
function handlehHttpSendChat() {
 if (httpSendChat.readyState == 4) {
  receiveChatText(); // chat refreshen na plaatsen chatbericht
 }
}

// afhandeling input en submit
function checkStatus(focusState) {
currentChatText = document.forms['chatForm'].elements['chatbarText'];
oSubmit = document.forms['chatForm'].elements['submit'];
if (currentChatText.value != '' || focusState == 'active') {
oSubmit.disabled = false;
} else {
oSubmit.disabled = true;
}
}

// XMLHttpRequest object
function getHTTPObject() {
 var xmlhttp;
 /*@cc_on
 @if (@_jscript_version >= 5)
   try {
     xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
   } catch (e) {
     try {
       xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
     } catch (E) {
       xmlhttp = false;
     }
   }
 @else
 xmlhttp = false;
 @end @*/
 if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
   try {
     xmlhttp = new XMLHttpRequest();
   } catch (e) {
     xmlhttp = false;
   }
 }
 return xmlhttp;
}