function markBlocked( container ) {
	var contentLinks = container ?
		$( container ).find( 'a' ) :
		( mw.util.$content || $( '.mw-body' ) ).find( 'a' ).add( '#ca-nstab-user a' );
	
	if ( !markBlockedCSS ) {
		markBlockedCSS = mw.util.addCSS('\
			.mediawiki .user-blocked-partial {'  + ( window.mbPartialStyle || 'opacity: 0.5' ) + '}\
			.mediawiki .user-blocked-temp {'   + ( window.mbTempStyle || 'opacity: 0.7; text-decoration: line-through' ) + '}\
			.mediawiki .user-blocked-indef {'  + ( window.mbIndefStyle || 'opacity: 0.4; font-style: italic; text-decoration: line-through' ) + '}\
			.mediawiki .user-blocked-tipbox {' + ( window.mbTipBoxStyle || 'font-size:85%; background:#FFFFF0; border:1px solid #FEA; padding:0 0.3em; color:#AAA' ) + '}\
		');
	}
	var mbTooltip =  window.mbTooltip || ';$1 bloklanma ($2; $3 tərəfindən): $4 ($5 əvvəl)';

	//get all aliases for user: & user_talk:
	var userNS = [];
	for ( var ns in mw.config.get( 'wgNamespaceIds' ) ) {
		if ( mw.config.get( 'wgNamespaceIds' )[ ns ] == 2 || mw.config.get( 'wgNamespaceIds' )[ ns ] == 3 ) {
			userNS.push( ns.replace( /_/g, ' ' ) + ':' );
		}
	}

	//RegExp  for all titles that are  User: | User_talk: | Special:Contributions/ (localized) | Special:Contributions/ (for userscripts)
	var userTitleRX = new RegExp( '^'
		+ '(' + userNS.join( '|' )
		+ '|Xüsusi:Töhfələr\\/|Xüsusi:Fəaliyyətlər\\/|Special:Contributions\\/'
		+ ')'
		+ '([^\\/#]+)$', 'i' );

	//RegExp for links
	var articleRX = new RegExp(
		'^(?:' + mw.config.get( 'wgServer' ) + ')?' +
		mw.config.get( 'wgArticlePath' ).replace( '$1', '' ) + '([^#]+)'
	);
	var scriptRX = new RegExp(
		'^(?:' + mw.config.get( 'wgServer' ) + ')?' +
		mw.config.get( 'wgScript' ) + '\\?title=([^#&]+)'
	);

	var userLinks = {};
	var url, ma, pgTitle;


	//find all "user" links and save them in userLinks : { 'users': [<link1>, <link2>, ...], 'user2': [<link3>, <link3>, ...], ... }
	contentLinks.each( function( i, lnk ) {
		url = $( lnk ).attr( 'href' );
		if ( !url || url.charAt( 0 ) !== '/' ) {
			return;
		}
		if ( ma = articleRX.exec( url ) ) {
			pgTitle = ma[ 1 ];
		} else if ( ma = scriptRX.exec( url ) ) {
			pgTitle = ma[ 1 ];
		} else {
			return;
		}
		pgTitle = decodeURIComponent( pgTitle ).replace( /_/g, ' ' );
		user = userTitleRX.exec( pgTitle );
		if ( !user ) {
			return;
		}
		user = user[ 2 ];
		if ( user === 'Silinməyə namizəd' ) {
			return;
		}
		$( lnk ).addClass( 'userlink' );
		if ( !userLinks[ user ] ) {
			userLinks[ user ] = [];
		}
		userLinks[ user ].push (lnk );
	} );


	//convert users into array
	var users = [];
	for ( var u in userLinks ) {
		users.push( u );
	}
	if ( users.length === 0 ) {
		return;
	}

	//API request
	var serverTime,
		apiRequests = 0;
	var waitingCSS = mw.util.addCSS( 'a.userlink {opacity:' + ( window.mbLoadingOpacity || 0.85 ) + '}' );	
	while ( users.length > 0 ) {
		apiRequests++;
		$.post( 
			mw.util.wikiScript( 'api' ) + '?format=json&action=query',
			{
				list: 'blocks',
				bklimit: 100,
				bkusers: users.splice( 0, 50 ).join( '|' ),
				bkprop: 'user|by|timestamp|expiry|reason|flags'
				//no need for 'id'
			},
			markLinks
		);
	}

	return; //the end


	//callback: receive data and mark links
	function markLinks( resp, status, xhr ) {

		serverTime = new Date( xhr.getResponseHeader('Date') );
		var list, blk, tip, links, lnk, blPartial;
		if ( !resp || !( list = resp.query ) || !( list = list.blocks ) ) {
			return;
		}

		for ( var i = 0; i < list.length; i++ ) {
			blk = list[ i ];
			blPartial = '';
			if ( /^in/.test( blk.expiry ) ) {
				clss = 'user-blocked-indef';
				blTime = blk.expiry;
			} else {
				clss = 'user-blocked-temp';
				blTime = inHours ( parseTS( blk.expiry ) - parseTS( blk.timestamp ) );
			}
			if ('partial' in blk) {
				clss = 'user-blocked-partial';
				blPartial = ' partial';
			} 
			tip = mbTooltip.replace( '$1', blPartial )
				.replace( '$2', blTime )
				.replace( '$3', blk.by )
				.replace( '$4', blk.reason )
				.replace( '$5', inHours ( serverTime - parseTS( blk.timestamp ) ) );
			links = userLinks[ blk.user ];
			for ( var k = 0; k < links.length; k++ ) {
				lnk = $( links[ k ] ).addClass( clss );
				if ( window.mbTipBox ) {
					$( '<span class=user-blocked-tipbox>#</span>' ).attr( 'title', tip ).insertBefore( lnk );
				} else {
					lnk.attr( 'title', lnk.attr( 'title' ) + tip );
				}
			}
		}

		if ( --apiRequests === 0 ) { //last response
			waitingCSS.disabled = true;
			$( '#ca-showblocks' ).parent().remove(); // remove added portlet link
		}

	}

	//--------AUX functions

	//20081226220605 or 2008-01-26T06:34:19Z -> date
	function parseTS( ts ) {
		var m = ts.replace( /\D/g, '' ).match( /(\d\d\d\d)(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)/ );
		return new Date ( Date.UTC( m[ 1 ], m[ 2 ] - 1, m[ 3 ], m[ 4 ], m[ 5 ], m[ 6 ] ) );
	}

	function inHours( ms ) { //milliseconds -> "2:30" or 5,06d or 21d
		var mm = Math.floor( ms / 60000 );
		if ( !mm ) {
			return Math.floor( ms / 1000 ) + 's';
		}
		var hh = Math.floor( mm / 60 );
		mm = mm % 60;
		var dd = Math.floor( hh / 24 );
		hh = hh % 24;
		if ( dd ) {
			return dd + ( dd < 10 ? '.' + zz( hh ) : '' ) + 'd';
		}
		return hh + ':' + zz( mm );
	}

	function zz( v ) { // 6 -> '06'
		if ( v <= 9 ) {
			v = '0' + v;
		}
		return v;
	}
}// -- end of main function

// FIXME: a global variable
var markBlockedCSS;


//start on some pages
switch ( mw.config.get( 'wgAction' ) ) {
	case 'edit':
	case 'submit':
	case 'delete':	
		break;
	case 'view':
		if ( $.inArray( mw.config.get( 'wgNamespaceNumber' ), [ 0, 10 ] ) !== -1 ) {
			break;
		}
		// otherwise continue with default
	default: // 'history', 'purge'
		// In case if the gadget is loaded directly by URL
		mw.loader.using( 'mediawiki.util' ).done( function () {
			if ( window.mbNoAutoStart ) {
				mw.util.addPortletLink( 'p-cactions', 'javascript:markBlocked()', 'XX', 'ca-showblocks' );
			} else {
				mw.hook( 'wikipage.content' ).add( function () {
					markBlocked();
		  		} );
			}
		} );
}