// Opera support
/*
if (window.opera && navigator.javaEnabled ()) { // && !window.XMLHttpRequest) {
  window.XMLHttpRequest = function () {
    this.readyState = 0; // 0=uninitialized,1=loading,2=loaded,3=interactive,4=complete
    this.status = 0; // HTTP status codes
    this.statusText = '';
    this._headers = [];
    this._aborted = false;
    this._async = true;
    this.abort = function() {
      this._aborted = true;
    };
    this.getAllResponseHeaders = function() {
      return this.getAllResponseHeader ('*');
    };
    this.getAllResponseHeader = function(header) {
      var ret = '';
      for (var i = 0; i < this._headers.length; i++) {
        if (header == '*' || this._headers[i].h == header) {
          ret += this._headers[i].h + ': ' + this._headers[i].v + '\n';
        }
      }
      return ret;
    };
    this.setRequestHeader = function (header, value) {
      this._headers[this._headers.length] = {h:header, v:value};
    };
    this.open = function (method, url, async, user, password) {
      this.method = method;
      this.url = url;
      this._async = true;
      this._aborted = false;
      if (arguments.length >= 3) {
        this._async = async;
      }
      if (arguments.length > 3) {
        // user/password support requires a custom Authenticator class
        opera.postError ('XMLHttpRequest.open () - user/password not supported');
      }
      this._headers = [];
      this.readyState = 1;
      if (this.onreadystatechange) {
        this.onreadystatechange();
      }
    };
    this.send = function (data) {
//      if (!navigator.javaEnabled ()) {
//        alert ('XMLHttpRequest.send () - Java must be installed and enabled.');
//        return;
//      }
      if (this._async) {
        setTimeout (this._sendasync, 0, this, data);
        // this is not really asynchronous and won't execute until the current
        // execution context ends
      } else {
        this._sendsync(data);
      }
    }
    this._sendasync = function (req, data) {
      if (!req._aborted) {
        req._sendsync(data);
      }
    };
    this._sendsync = function (data) {
      this.readyState = 2;
      if (this.onreadystatechange) {
        this.onreadystatechange();
      }
      // open connection
      var url = new java.net.URL (new java.net.URL(window.location.href), this.url);
      var conn = url.openConnection ();
      for (var i = 0; i < this._headers.length; i++) {
        conn.setRequestProperty (this._headers[i].h, this._headers[i].v);
      }
      this._headers = [];
      if (this.method == 'POST') {
        // POST data
        conn.setDoOutput(true);
        var wr = new java.io.OutputStreamWriter(conn.getOutputStream());
        wr.write (data);
        wr.flush ();
        wr.close ();
      }
      // read response headers
      // NOTE: the getHeaderField() methods always return nulls (!)
      var gotContentEncoding = "windows-1251";
      var gotContentLength = false;
      var gotContentType = false;
      var gotDate = false;
      var gotExpiration = false;
      var gotLastModified = false;
      for (var i = 0; ; i++) {
        var hdrName = conn.getHeaderFieldKey (i);
        var hdrValue = conn.getHeaderField (i);
        if (hdrName == null && hdrValue == null) {
          break;
        }
        if (hdrName != null) {
          this._headers[this._headers.length] = {h:hdrName, v:hdrValue};
          switch (hdrName.toLowerCase ()) {
            case 'content-encoding': gotContentEncoding = true; break;
            case 'content-length'  : gotContentLength   = true; break;
            case 'content-type'    : gotContentType     = true; break;
            case 'date'            : gotDate            = true; break;
            case 'expires'         : gotExpiration      = true; break;
            case 'last-modified'   : gotLastModified    = true; break;
          }
        }
      }
      // try to fill in any missing header information
      var val;
      val = conn.getContentEncoding ();
      if (val != null && !gotContentEncoding) this._headers[this._headers.length] = {h:'Content-encoding', v:val};
      val = conn.getContentLength ();
      if (val != -1 && !gotContentLength) this._headers[this._headers.length] = {h:'Content-length', v:val};
      val = conn.getContentType ();
      if (val != null && !gotContentType) this._headers[this._headers.length] = {h:'Content-type', v:val};
      val = conn.getDate ();
      if (val != 0 && !gotDate) this._headers[this._headers.length] = {h:'Date', v:(new Date (val)).toUTCString ()};
      val = conn.getExpiration ();
      if (val != 0 && !gotExpiration) this._headers[this._headers.length] = {h:'Expires', v:(new Date (val)).toUTCString ()};
      val = conn.getLastModified ();
      if (val != 0 && !gotLastModified) this._headers[this._headers.length] = {h:'Last-modified', v:(new Date (val)).toUTCString ()};
      // read response data
      var reqdata = '';
      var stream = conn.getInputStream ();
      if (stream) {
        var reader = new java.io.BufferedReader (new java.io.InputStreamReader (stream));
        var line;
        while ((line = reader.readLine ()) != null) {
          if (this.readyState == 2) {
            this.readyState = 3;
            if (this.onreadystatechange) {
              this.onreadystatechange();
            }
          }
          reqdata += line + '\n';
        }
        reader.close ();
        this.status = 200;
        this.statusText = 'OK';
        this.responseText = reqdata;
        this.readyState = 4;
        if (this.onreadystatechange) {
          this.onreadystatechange ();
        }
        if (this.onload) {
          this.onload ();
        }
      } else {
        // error
        this.status = 404;
        this.statusText = 'Not Found';
        this.responseText = '';
        this.readyState = 4;
        if (this.onreadystatechange) {
          this.onreadystatechange ();
        }
        if (this.onerror) {
          this.onerror ();
        }
      }
    };
  };
}*/

function u_enc (s)
{
  s = s.replace (/%/g, '%25');
  s = s.replace (/\+/g, '%2B');
  s = s.replace (/#/g, '%23');
  s = s.replace (/&/g, '%26');
  s = s.replace (/\?/g, '%3F');
  s = s.replace (/=/g, '%3D');
  s = s.replace (/ /g, '%20');
  return s;
}
		

// POST form (if any), url (for POST just script name), process request function, rule codes
// 1 - strip code, 2 - eval at once, 4 - post request
function ajax_request (frm, url, func, ccode)
{
  var req;
  if (window.XMLHttpRequest) { // Mozilla+
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) { // IE
    try { req = new ActiveXObject("Microsoft.XMLHTTP"); } 
    catch (e) {
      try { req = new ActiveXObject("Msxml2.XMLHTTP"); } 
      catch (e) {}
    }
  }
  if (!req) {
    // failed to create request
    return false;
  }
  var rpost = 4 & ccode;
  var aurl = '';
  if (req.overrideMimeType) req.overrideMimeType ('text/xml');
  adonp = (new Date()).getTime()+'='+Math.random();
  if (frm) { // build request content from submitted form
    var fcnt = new Array ();
    fcnt.push (adonp);
    for (i = 0; i < frm.elements.length; i++) {
      if (frm.elements[i].name != '') {
	var e_v = String (frm.elements[i].value);
        fcnt.push (frm.elements[i].name + '=' + u_enc (e_v));
      }
    }
    aurl = fcnt.join ('&');
  } else {
    url += '&'+adonp;
  }
  if (!rpost && aurl) url += '?' + aurl;
  
  try {
    req.setRequestHeader ('Content-Type', rpost ? 'application/x-www-form-urlencoded' : 'text/html; charset=windows-1251;');
    req.setRequestHeader ('If-Modified-Since', 'Sat, 1 Jan 2000 00:00:00 GMT');
  } catch (e) {}
  req.onreadystatechange = function() {
    if (req.readyState == 4) {
      if (req.status == 200) {
	var rstr = String (req.responseText);
	if (1 & ccode) { // process as js code
	  rstr = rstr.substring (rstr.indexOf ('<script>') + 8, rstr.indexOf ('</script>'));
	  rstr = rstr.replace (/^\/\//, ''); // kill commenting
	}
	if (2 & ccode) { // try to eval at once
	  try { eval (rstr); } catch (e) {}
	} else if (func) {
          func (rstr); // hihi :)
	}
      } else {
        // http error
      }
    }
  };
  req.open (rpost ? 'POST' : 'GET', url, true);
  if (window.ActiveXObject) { if (rpost) req.send (aurl); else req.send (); }
  else req.send (rpost ? aurl : null);
}