//*******************************************
//   XML函数
//*******************************************

var xmlHttp = createXmlHttpRequestObject();

// creates an XMLHttpRequest instance
function createXmlHttpRequestObject() 
{
  // will store the reference to the XMLHttpRequest object
  var xmlHttp;
  // this should work for all browsers except IE6 and older
  try {
    // try to create XMLHttpRequest object
    xmlHttp = new XMLHttpRequest();
  }
  catch(e) {
    // assume IE6 or older
    var XmlHttpVersions = new Array('MSXML2.XMLHTTP.6.0',
                                    'MSXML2.XMLHTTP.5.0',
                                    'MSXML2.XMLHTTP.4.0',
                                    'MSXML2.XMLHTTP.3.0',
                                    'MSXML2.XMLHTTP',
                                    'Microsoft.XMLHTTP');
    // try every prog id until one works
    for (var i=0; i<XmlHttpVersions.length && !xmlHttp; i++)
    {
      try { 
        // try to create XMLHttpRequest object
        xmlHttp = new ActiveXObject(XmlHttpVersions[i]);
      } 
      catch (e) {}
    }
  }
  // return the created object or display an error message
  if (!xmlHttp)
    alert("Error creating the XMLHttpRequest object.");
  else 
    return xmlHttp;
}

var iDiv;
// read a file from the server
function version_process(itype, date)
{
  // only continue if xmlHttp isn't void
  if (xmlHttp)
  {
    // try to connect to the server
    try
    {
		iDiv = document.getElementById("Info");
		iDiv.innerHTML = "<img src='../img/loading.gif' width='20' height='20'> loading, please wait...";
		xmlHttp.open("GET", '../html/version.xml?now=' + date, true);
		xmlHttp.onreadystatechange = handleRequestStateChange;
		xmlHttp.send(null);
    }
    catch (e)
    {
      alert("Can't connect to server:\n" + e.toString());
    }
  }
}

// function called when the state of the HTTP request changes
function handleRequestStateChange() 
{
  // when readyState is 4, we are ready to read the server response
  if (xmlHttp.readyState == 4) 
  {
    // continue only if HTTP status is "OK"
    if (xmlHttp.status == 200) 
    {
      try
      {
        handleServerResponse();
      }
      catch(e)
      {
        alert("Error reading the response: " + e.toString());
      }
    } 
    else
    {
      alert("There was a problem retrieving the data:\n" + xmlHttp.statusText);
    }
  }
}

// handles the response received from the server
function handleServerResponse()
{
	var xmlResponse = xmlHttp.responseXML;
	xmlRoot = xmlResponse.documentElement;
	svnArray = xmlRoot.getElementsByTagName("rsvn");
	dateArray = xmlRoot.getElementsByTagName("rdate");
	rsvn = svnArray.item(0).firstChild.data;
	rdate = dateArray.item(0).firstChild.data;
	svnArray = xmlRoot.getElementsByTagName("bsvn");
	dateArray = xmlRoot.getElementsByTagName("bdate");
	bsvn = svnArray.item(0).firstChild.data;
	bdate = dateArray.item(0).firstChild.data;
	svnArray = xmlRoot.getElementsByTagName("esvn");
	esvn = svnArray.item(0).firstChild.data;

	Version = '<br><h2>Download The Latest Verison:</h2>';
	var down = '<a href="http://sourceforge.net/projects/mplayer-ww/files/MPlayer_';

	var endls = '/download" target="_blank">MPlayer SVN-r'+ rsvn + '(' + rdate +')</a></li>';
	Release = '<li>Release: ' + down + 'Release/Revision%20' + rsvn + '/mplayer_lite_r' + rsvn + '.7z' + endls;

	endls = '/download" target="_blank">MPlayer SVN-r'+ bsvn + '(' + bdate +')</a></li>';
	Beta = '<li>Beta: ' + down + 'Beta/mplayer-SVN-r' +bsvn+ '.7z' + endls;

	endls = '/download" target="_blank">MPlayer Extra Package</a></li>';
	Extra = '<li>Other: ' + down + 'Release/Revision%20' +esvn+ '/mplayer_extra_package.7z' + endls;

	if(rsvn >= bsvn && rdate >= bdate)
		Download = Release + Beta + '<br>';
	else
		Download = Beta + Release + '<br>';

	Download += Extra + '<br>';

	dDiv = document.getElementById("Download");
	iDiv.innerHTML = Version;
	dDiv.innerHTML = Download;
}