var lines    = 35;
var title    = '';
var offset   = 0;
var messages = new Array();
var message  = document.getElementById('message');
var CMem  = document.getElementById('CMem');
var chat  = document.getElementById('chat');
var tmrRead = setTimeout('chat_read();', 300);

function request_write(url, post) {
  r = false;
  if (window.XMLHttpRequest) {
    r = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    try {
      r = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e) {
      try {
        r = new ActiveXObject("Microsoft.XMLHTTP");
      } catch(e) {
      }
    }
  }
  if (!r) return false;
  r.onreadystatechange = alert_write;
  if (post == null) {
    r.open('GET', url, true);
    r.send(null);
  } else {
    r.open('POST', url, true);
    r.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    r.send(post);
  }
}

function alert_write() {
  try {
    if ((r.readyState == 4) && (r.status == 200)) parse(r.responseText);
  } catch(e) {
  }
}

function request_read(url, post) {
  r2 = false;
  if (window.XMLHttpRequest) {
    r2 = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    try {
      r2 = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e) {
      try {
        r2 = new ActiveXObject("Microsoft.XMLHTTP");
      } catch(e) {
      }
    }
  }
  if (!r2) return false;
  r2.abort();
  r2.onreadystatechange = alert_read;
  if (post == null) {
    r2.open('GET', url, true);
    r2.send(null);
  } else {
    r2.open('POST', url, true);
    r2.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    r2.send(post);
  }
}

function alert_read() {
  clearTimeout(tmrRead);
  try {
    if ((r2.readyState == 4) && (r2.status == 200)) {
      parse(r2.responseText);
      tmrRead = setTimeout('chat_read();', 30);
    }
  } catch(e) {
    tmrRead = setTimeout('chat_read();', 3000);
  }
}

function chat_read() {
  clearTimeout(tmrRead);
  request_read('FChatEngine.php?r='+offset+'&u='+escape(CMem.value), null);
}

function keyup(e) {
  if (window.event) k = window.event.keyCode;
  else if (e) k = e.which;
  else return true;
  if (k == 13) chat_write();
}

function chat_display() {
  html = '';
  i = 0;
  while ((i < lines) && (i < offset)) {
    h = offset-i;
    if (messages[h]) html = messages[h] + html;
    i++;
  }
  chat.innerHTML = '<table style="border:none; margin:0; padding:0; width:700px;" cellpadding="0" cellspacing="0" >'+html+'</table>';
  chat.scrollTop = chat.scrollHeight;
  if (title != '') {
    title = title.replace(/&amp;/g, '&');
    title = title.replace(/&quot;/g, '"');
    title = title.replace(/&#039;/g, '\'');
    title = title.replace(/&lt;/g, '<');
    title = title.replace(/&gt;/g, '>');
  }
}

function chat_write() {
  request_write('FChatEngine.php', 'w='+escape(message.value)+'&u='+escape(CMem.value));
  message.value = '';
}

function cs(o, i, t, u, m, c) {

 if (u == '1')
 {
	if (title == '') title = m;
    m = unescape(m);
    messages[o] = '<tr><td class="tdChat3"></td><td class="tdChat2" valign="top"><div style="width:620px;  overflow:hidden;">'+m+'</div></td></tr>';
 }
 else
 {
  if (m == '<E>') {
    if (u != '') messages[o] = '<tr><td id="C'+i+'" class="tdChat1" valign="top">'+t+'</td><td id="C'+i+'" class="tdChat2" valign="top">' + u + ' <strong>إنضم للدردشة.</strong></td></tr>';
  } else if (m == '<L>') {
    if (u != '') messages[o] = '<tr><td id="C'+i+'" class="tdChat1" valign="top">'+t+'</td><td id="C'+i+'" class="tdChat2" valign="top">' + u + ' <strong>ترك الدردشة.</strong></td></tr>';
  } else {
    if (title == '') title = m;
    m = unescape(m);
    messages[o] = '<tr><td id="C'+i+'" class="tdChat1" valign="top">'+t+'</td><td id="C'+i+'" class="tdChat2" valign="top"><div style="width:620px;  overflow:hidden;">' + u + '&nbsp;'+m+'</div></td></tr>';
  }
 }
  
  if (o > offset) {
    offset = o;
    window.focus();
    message.focus();
  }
}

function parse(s) {
  if (s != '') {
    s = unescape(s);
    eval(s);
    chat_display();
  }
}