var title = 0;
var lines = 0;

function parselevel(level, skiptext, maxlines){
  if(level.textContent.search(skiptext)==-1){
    
    if(level.nodeName == "title"){
      title = '<b>' + level.textContent + '</b><br/>';
    }

    if(level.nodeName == "description"){
      if(title != 0){
        if(maxlines == lines){
          return;
        }
        document.write('<a ');
        if(lines%2){
          document.write('style="background-color: #90e090;"');
        }
        document.write('>' + title + '' + level.textContent + '</i></a>');
        document.write('<br />');
	title = 0;
        lines = lines + 1;
      }
    }
  }

  for(var i=0; i < level.childNodes.length; i++){
    parselevel(level.childNodes[i], skiptext, maxlines);
  }
}

function parserss(rssfile, skiptext, maxlines){
  var xmlDoc=document.implementation.createDocument("","",null);

  xmlDoc.async=false;
  xmlDoc.load(rssfile);
  var root = xmlDoc.documentElement;

  title = 0;
  lines = 0;

  parselevel(root, skiptext, maxlines);
}

$userid = 'errimg'; // set your userid of picasa
$thumbsize = '108'; // set resolution of thumbnail among 54, 108 or 216

function startElement($parser, $name, $attrs){
    global $record;
    global $canstart;
    
    if($name == 'TITLE' && $attrs["TYPE"] == 'text' && $canstart)
        $record = true;
    if($name == 'ENTRY')
        $canstart = true;
}
function endElement($parser, $name){
    global $tmparray;
    global $record;
    global $curfield;
    global $canstart;

    $record = false;
    if($name == 'TITLE' && $canstart){
        $tmparray[] = $curfield;
        $curfield = '';
    }
}
function elementContent($parser, $data){
    global $curfield;
    global $record;

    if($record)
         $curfield .= $data;
}
function startIdElement($parser, $name, $attrs){
    global $canstart;
    global $tmparray;
    global $thumbsize;

    if($name == 'MEDIA:THUMBNAIL' && $attrs['HEIGHT'] == '108' && $canstart)
        $tmparray[] = $attrs['URL'];
    if($name == 'ENTRY')
        $canstart = true;
}
function endIdElement($parser, $name){
}

function getAlbums($userId){
    global $tmparray;
    global $canstart;

    $tmparray = array();
    $canstart = false;

    $url = 'http://picasaweb.google.com/data/feed/api/user/'.urlencode($userId).'?kind=album';
    $xml = file_get_contents($url);

    $xml_parser = xml_parser_create();
    xml_set_element_handler($xml_parser, "startElement", "endElement");
    xml_set_character_data_handler($xml_parser, 'elementContent');
    xml_parse($xml_parser, $xml);
    xml_parser_free($xml_parser);
}

function showAlbumContent($userId, $albumName){
    global $tmparray;
    global $canstart;

    $tmparray = array();
    $canstart = false;

    $url = 'http://picasaweb.google.com/data/feed/api/user/'.urlencode($userId).'/album/'.urlencode($albumName);
    $xml = file_get_contents($url);
    
    $xml_parser = xml_parser_create();
    xml_set_element_handler($xml_parser, "startIdElement", "endIdElement");
    xml_parse($xml_parser, $xml);
    xml_parser_free($xml_parser);
}

getAlbums($userid);

if(!empty($tmparray)){
  $album_title = $tmparray[array_rand($tmparray, 1)];
  $album_title = ereg_replace("[^A-Za-z0-9]", "", $album_title);
  showAlbumContent($userid, $album_title);
  if(!empty($tmparray)){
     $random_pic = $tmparray[array_rand($tmparray, 1)];
     print '<a href="http://picasaweb.google.com/'.$userid.'/'.$album_title
        .'"><img src="'.$random_pic .'" alt=""></a>';
  }
}