/**
 *  Execute javascripts and parse html
 *
 */
function sethtml(content) {
  var search = content;
  var loc    = 0;
  var script;
  var endscript;

  while( script = search.match(/(<script[^>]+javascript[^>]+>\s*(<!--)?)/i))
  {
    search = search.substr(search.indexOf(script[0]) + script[0].length);

    if (!(endscript = search.match(/((-->)?\s*<\/script>)/))) break;   

    block = search.substr(0, search.indexOf(endscript[0]));
    search = search.substring(endscript[0].length + endscript[0].length);

    var oScript = document.createElement('script');
    oScript.text = block;

    if (oScript.innerHTML.search('location.href') != -1) {
      loc = 1;
    }
    document.getElementsByTagName("head").item(0).appendChild(oScript);
  }

  return loc;
}


/**
 *  Retrieve xmlhttp data
 *
 */
function xmlhttp_data(href, div, async, base, id, post_param, get_param, func) {
  // Initial values
  var result     = '';
  var xmlrequest = null;
  var loc        = 0;

  // Asynchronous/synchronous
  var async_action = (((typeof(async) != 'undefined') && (async != ''))  || (async == 1)) ? 1 : 0

  try {
    xmlrequest = new XMLHttpRequest();
  }
  catch (e) {
    try {
      xmlrequest = new ActiveXObject('Msxml2.XMLHTTP');
    }
    catch (e) {
      try {
        xmlrequest = new ActiveXObject('Microsoft.XMLHTTP');
      }
      catch (e) {
        xmlrequest = null;
      }
    }
  }

  if (!xmlrequest && window.createRequest) {
    try {
      xmlrequest = window.createRequest();
    }
    catch (e) {
      xmlrequest = null;
    }
  }

  // Return empty string when no xmlhttp request could be created
  if (xmlrequest != null) {
    if (async_action) {
      xmlrequest.onreadystatechange = function() {
        // Return value?
        if (xmlrequest.readyState  == 4) {
          if (xmlrequest.status == 200) {
            // Skip when no response empty
            if (xmlrequest.responseText.length > 0) {
              // Handle all javascripts => redirect?
              loc = sethtml(xmlrequest.responseText);
              
              // Set innerHTML
              if ((typeof(div) != 'undefined') && (div.length) && (div != '')) {
                if (!loc) {
                  try {
                      getElement(div).innerHTML = xmlrequest.responseText;
                  }
                  catch (err) {}
                }
              }
              else {
                result = xmlrequest.responseText;
              }
            }
          }

          // Assign an empty function to the state handler;
          xmlrequest.onreadystatechange = function () {}

          // Abort current transfer. This will also call the state handler, which is not what we want
          xmlrequest.abort();

          // Clear object
          xmlrequest = null;

          if ((!loc) && (typeof(func) != 'undefined')) {
            // function pointer
            try {
              func(result);
            }
            catch(err) {}
          }
        }
      }
    }

    // action => synchronous/asynchronous
    var action = (async_action) ? true : false;

    // Post parameters?
    params = '';
    if ((typeof(post_param) == 'string') && (post_param.length) && (post_param != '')) {
       params += post_param;
    }

    // href + get parameters?
    href_get_param = base + href + '?id=' + id;
    if ((typeof(get_param) == 'string') && (get_param.length) && (get_param != '')) {
      href_get_param += get_param;
    }

    xmlrequest.open('POST', href_get_param, action);
    //Send the proper header information along with the request
    xmlrequest.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
    xmlrequest.send(params);

    if (!async_action) {
      // Return value?
      if (xmlrequest.status == 200) {
        // Skip when no response empty
        if (xmlrequest.responseText.length > 0) {
          // Handle all javascripts => redirect?
          loc = sethtml(xmlrequest.responseText);
          
          // Set innerHTML
          if ((typeof(div) != 'undefined') && (div.length) && (div != '')) {
            if (!loc) {
              getElement(div).innerHTML = xmlrequest.responseText;
            }
          }
          else {
            result = xmlrequest.responseText;
          }
        }
      }

      // Assign an empty function to the state handler;
      xmlrequest.onreadystatechange = function () {}

      // Abort current transfer. This will also call the state handler, which is not what we want
      xmlrequest.abort();

      // Clear object
      xmlrequest = null;

      if ((!loc) && (typeof(func) != 'undefined')) {
        // function pointer
        try {
          func(result);
        }
        catch(err) {
        	console.log(err);
        }
      }
    }
  }
  else {
    // Asynchronous request; return the Ajax object so the caller can
    //	process it further, where necessary
    result = xmlrequest;
  }

  return result;
}