var lines    = 100;
var offset   = 0;
var messages = new Array();
var message  = document.getElementById('message');
var chat     = document.getElementById('chat');
var online   = document.getElementById('online');
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('control.php?r='+offset, 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 = '';
  users = '<b>&nbsp;Résztvevők:</b>';
  i = 0;
  while ((i < lines) && (i < offset)) {
    h = offset-i;
    if (messages[h]) html = messages[h] + html;
    i++;
  };
  chat.innerHTML = html;
  online.innerHTML = users;
  var div = document.getElementById('chat');
  h = div.scrollHeight;
  div.scrollTop = h;
}

function chat_write() {
  request_write('control.php', 'w='+escape(message.value));
  message.value = '';
}

function cs(o, i, t, u, m, c) {
	var conm = 'yes';
	if ( (m == '<E>') ) {
		if (conm == 'yes') {
			if (u != '') messages[o] = '<span id="C1">['+t+'] * '+u+' csatlakozott a beszélgetéshez! *'+'</span><br />';
		}
	} else if ( (m == '<L>') ) {
		if (conm == 'yes') {
			if (u != '') messages[o] = '<span id="C1">['+t+'] * '+u+' kilépett a beszélgetésből! *'+'</span><br />';
		}
	} else {
		if (u != '') {
			u += ':';
			spaces = 5 - u.length;
			for (j = 0; j < spaces; j++) u += "&nbsp;";
			u += '&nbsp;';
		}
		m = m.replace(/ /g, '&nbsp;');
		messages[o] = '<span id="C1">['+t+']&nbsp;<i>'+u+'</i><strong>'+m+'</strong></span><br />';
	}
	if (o > offset) {
		offset = o;
		window.focus();
		message.focus();
	}
}

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