/****************************************************************************\
|*                                                                          *|
|*                        XMLHttpRequest library                            *| 
|*                                                                          *| 
\****************************************************************************/

/*

Cross-Browser XMLHttpRequest v1.2
=================================

Emulate Gecko 'XMLHttpRequest()' functionality in IE and Opera. Opera requires
the Sun Java Runtime Environment <http://www.java.com/>.

by Andrew Gregory
http://www.scss.com.au/family/andrew/webdesign/xmlhttprequest/

This work is licensed under the Creative Commons Attribution License. To view a
copy of this license, visit http://creativecommons.org/licenses/by-sa/2.5/ or
send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California
94305, USA.

Attribution: Leave my name and web address in this script intact.

Not Supported in Opera
----------------------
* user/password authentication
* responseXML data member

Not Fully Supported in Opera
----------------------------
* async requests
* abort()
* getAllResponseHeaders(), getAllResponseHeader(header)

*/
// IE support
if (window.ActiveXObject && !window.XMLHttpRequest) {
  window.XMLHttpRequest = function() {
    var msxmls = new Array(
      'Msxml2.XMLHTTP.5.0',
      'Msxml2.XMLHTTP.4.0',
      'Msxml2.XMLHTTP.3.0',
      'Msxml2.XMLHTTP',
      'Microsoft.XMLHTTP');
    for (var i = 0; i < msxmls.length; i++) {
      try {
        return new ActiveXObject(msxmls[i]);
      } catch (e) {
      }
    }
    return null;
  };
}
// Gecko support
/* ;-) */
// Opera support
if (window.opera && !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._defaultCharset = 'ISO-8859-1';
    this._getCharset = function() {
      var charset = _defaultCharset;
      var contentType = this.getResponseHeader('Content-type').toUpperCase();
      val = contentType.indexOf('CHARSET=');
      if (val != -1) {
        charset = contentType.substring(val);
      }
      val = charset.indexOf(';');
      if (val != -1) {
        charset = charset.substring(0, val);
      }
      val = charset.indexOf(',');
      if (val != -1) {
        charset = charset.substring(0, val);
      }
      return charset;
    };
    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.getResponseHeader = function(header) {
      var ret = getAllResponseHeader(header);
      var i = ret.indexOf('\n');
      if (i != -1) {
        ret = ret.substring(0, i);
      }
      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;
      this._headers = [];
      if (arguments.length >= 3) {
        this._async = async;
      }
      if (arguments.length > 3) {
        opera.postError('XMLHttpRequest.open() - user/password not supported');
      }
      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(), this._getCharset());
        wr.write(data);
        wr.flush();
        wr.close();
      }
      // read response headers
      // NOTE: the getHeaderField() methods always return nulls for me :(
      var gotContentEncoding = false;
      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, this._getCharset()));
        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();
        }
      }
    };
  };
}
// ActiveXObject emulation
if (!window.ActiveXObject && window.XMLHttpRequest) {
  window.ActiveXObject = function(type) {
    switch (type.toLowerCase()) {
      case 'microsoft.xmlhttp':
      case 'msxml2.xmlhttp':
      case 'msxml2.xmlhttp.3.0':
      case 'msxml2.xmlhttp.4.0':
      case 'msxml2.xmlhttp.5.0':
        return new XMLHttpRequest();
    }
    return null;
  };
}

// General function that opens up popup windows with the given // parameters set.
function openWindow(url, name, width, height, left, top,
  directories, scrollbars, location, menubar, status, toolbar) {

  if (!width)       width       = 400;
  if (!height)      height      = 400;
  if (!left)        left        = 10;
  if (!top)         top         = 10;
  if (!directories) directories = 0;
  if (!scrollbars)  scrollbars  = 0;
  if (!location)    location    = 0;
  if (!menubar)     menubar     = 0;
  if (!status)      status      = 0;
  if (!toolbar)     toolbar     = 0;

  var properties = 'width=' + width + ',height=' + height + ',top=' + top +
    ',directories=' + directories + ',scrollbars=' + scrollbars + ',location=' +
    location + ',menubar=' + menubar + ',status=' + status + ',toolbar=' + toolbar;

  var fs;
  if (url && name) {
    if (window.name == name){
      document.location.href = url;
    } else {
      fs = window.open(url, name, properties);
      try {
        fs.focus();
      } catch (e) {}
      return fs;
    }
  }
} // openWindow

function getFirstChildNode(element, tagName) {
  if (element && (element.childNodes.length > 0)) {
    for (var i = 0; i < element.childNodes.length; i++) {
      var child = element.childNodes[i];

      if ((child.nodeType == 1) && (child.tagName == tagName)) {
        return child;
      }
    }
  }

  return null;
} // getFirstChildNode

function getNode(collection, tagName, className) {
  if (collection.length > 0) {
    for (var i = 0; i < collection.length; i++) {
      var child = collection[i];

      if ((child.nodeType == 1) && (child.tagName == tagName) &&
        (child.className.indexOf(className) >= 0)) {
        return child;
      }
    }
  }

  return null;
} // getNode

function getNodes(collection, tagName, className) {
  var nodes = new Array();

  if (collection.length > 0) {
    for (var i = 0; i < collection.length; i++) {
      var child = collection[i];

      if ((child.nodeType == 1) && (child.tagName == tagName) &&
          (child.className.indexOf(className) >= 0)) {
        nodes.push(child);
      }
    }
  }

  return nodes;
} // getNodes

// OLD

function addEvent(obj, evType, fn) {
 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;
 }
} // addEvent

// NEW

// addEvent
// function addEvent(obj, type, fn) {
  //info('addEvent(' + typeof(obj) + ', ' + typeof(type) + ', ' + typeof(fn) + ')');

//  if (obj.addEventListener) {
//    obj.addEventListener(type, fn, false);
//    return true;
//  } else if (obj.attachEvent) {
//    var s   = 'e' + type + fn;
//    obj[s]  = fn;
//    obj[type + fn] = function() { obj[s](window.event); }
//    return obj.attachEvent('on' + type, obj[type + fn]);
//  }

//  return false;
// } // addEvent

// removeEvent
function removeEvent(obj, type, fn) {
  //info('removeEvent(' + typeof(obj) + ', ' + typeof(type) + ', ' + typeof(fn) + ')');

  if (obj.removeEventListener) {
    obj.removeEventListener(type, fn, false);
    return true;
  } else if (obj.detachEvent) {
    var r = obj.detachEvent('on' + type, obj[type + fn]);
    obj[type + fn]        = null;
    obj['e' + type + fn]  = null;
    return r;
  }
} // removeEvent

// OPENS AND CLOSES A DIV-ELEMENT WITH ID
// used for instance width tip a friend

function ShowHide(id) {
  obj = document.getElementsByTagName("div");
  if (obj[id].style.display == 'block') {
    obj[id].style.display = 'none';
  }
  else {
    obj[id].style.display = 'block';
  }
}

// OPENS AND CLOSES A UL-ELEMENT WITH ID

function ShowHideUL(id) {

  obj = document.getElementsByTagName("ul");

  if (obj[id].style.display == 'block') {

    obj[id].style.display = 'none';

  }

  else {

    obj[id].style.display = 'block';

  }

}

// PRINT

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

function print_preview() {
  // Switch the stylesheet
  setActiveStyleSheet('Utskriftsvennlig versjon');

  // Create preview message
  add_preview_message();

  // Print the page
  window.print();
}

function add_preview_message(){
var main_content = document.getElementById('top');
var main_body = main_content.parentNode;

  if (document.getElementById){

    var preview_message = document.createElement('div');
    preview_message.id = 'preview-message';

    // Create Heading
    var preview_header = document.createElement('h3');
    var preview_header_text = document.createTextNode('Dette er en utskriftsvennlig versjon.');
    preview_header.appendChild(preview_header_text);

    // Create paragraph
    var preview_para = document.createElement('p');
    // var preview_para_text = document.createTextNode('');

    var cancel_function_link = document.createElement('a');
      cancel_function_link.onclick = function(){ cancel_print_preview(); return false; };
      cancel_function_link.setAttribute('href', '#');
    var cancel_function_link_text = document.createTextNode('Tilbake til nettsiden.');
    cancel_function_link.appendChild(cancel_function_link_text);
    // preview_para.appendChild(preview_para_text);
    preview_para.appendChild(cancel_function_link);

    // Put it all toegether
    preview_message.appendChild(preview_header);
    preview_message.appendChild(preview_para);
    main_body.insertBefore(preview_message, main_content);

  }
}

function cancel_print_preview() {
  // Destroy the preview message
  var print_preview = document.getElementById('preview-message');
  var main_body = print_preview.parentNode;
  main_body.removeChild(print_preview);

  // Switch back stylesheet
  setActiveStyleSheet('Standard');
}

function setActiveStyleSheet(title) {
   var i, a, main;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
     if(a.getAttribute("rel").indexOf("style") != -1
        && a.getAttribute("title")) {
       a.disabled = true;
       if(a.getAttribute("title") == title) a.disabled = false;
     }
   }
}