Edit in JSFiddle

/* 
 *  jQuery Plugin - Wikipedia V1.0
 *  
 *  todo: add description here
 *  
 *  Autor: Marcel Grolms - www.suabo.de 2013
 */
$.fn.WikipediaWidget = function(wikipediaPage, options) {
    //init defaults
    var showTitle = true;
    var maxThumbnails = 3;
    var cutFirstInfoTableRows = 4;
    var maxInfoTableRows = 8;
    var thumbMaxWidth = '180px';
    var thumbMaxHeight = '180px';

    //option handling
    if (options != undefined) {
        //we got more options
        $.each(options, function(option, value) {
            switch (option) {
                case "showTitle":
                    showTitle = value;
                    break;

                case "maxThumbnails":
                    maxThumbnails = value;
                    break;

                case "maxInfoTableRows":
                    maxInfoTableRows = value;
                    break;

                case "cutFirstInfoTableRows":
                    cutFirstInfoTableRows = value;
                    break;

                case "thumbMaxHeight":
                    thumbMaxHeight = value;
                    break;

                case "thumbMaxWidth":
                    thumbMaxWidth = value;
                    break;
            }
        });
    }

    //check if pagetitle ist set
    if (wikipediaPage == undefined) {
        console.log('Kein Wikipedia Suchtitel!Keine Abfrage gestartet!');
        return;
    }
    //init given wikiContainer from the Selector init
    var wikiContainer = this;
    wikiContainer.append('<div class="ajaxLoading"><img src="img/ajax-loader.gif"></div>');
    //get data.parse.images
    $.getJSON('http://ja.wikipedia.org/w/api.php?action=parse&format=json&callback=?', {
        page: wikipediaPage,
        prop: 'text|images',
        uselang: 'de'
    }, function(parsedata) {
        //remove loading image
        wikiContainer.find('.ajaxLoading').remove();
        //debug
        //console.log(parsedata);
        //drop text to div container
        var content = $(parsedata.parse.text["*"]).wrap('<div></div>').parent();
        //insert title
        if (showTitle) {
            wikiContainer.append('<div class="wikipediaTitle"></div>').find('.wikipediaTitle').html(parsedata.parse.title);
        }
        //get images of right side table
        var rightTableImages = content.find('table a.image img');
        //append first image to main container  
        wikiContainer.append($(rightTableImages).first().removeAttr('srcset').removeAttr('height').removeAttr('width').wrap('<div class="wikipediaLogo"></div>').parent());
        //append description to main container
        var description = content.find('p').first().text();
        wikiContainer.append('<div class="wikipediaDescription"></div>').find('.wikipediaDescription').append(description);
        //get thumbnail images
        var rightThumbnails = content.find('.thumb a.image img');
        wikiContainer.append('<ul class="wikipediaThumbGallery"></ul>');
        //add maxThumbnails to main container
        $.each(rightThumbnails, function(index, Thumbnail) {
            //add thumb with thumbMaxHeight and thumbMaxWidth
            if (index < maxThumbnails) wikiContainer.find('.wikipediaThumbGallery').append($(Thumbnail).removeAttr('srcset').removeAttr('height').removeAttr('width').css({
                'width': 'auto',
                'height': 'auto',
                'max-width': thumbMaxWidth,
                'max-height': thumbMaxHeight
            }).wrap('<li class="wikipediaThumbnail"></li>').parent());
        });
        //get right side table
        var rightTable = content.find('table.infobox, table.float-right').first();
        //init new table
        var newTable = $('<table class="wikipediaInfoTable"></table>');
        //parse new table from right side table with cutFirstInfoTable and maxInfoTableRows
        $.each(rightTable.find('tr'), function(index, element) {
            if (index > cutFirstInfoTableRows && index < (cutFirstInfoTableRows + maxInfoTableRows)) newTable.append(element);
        });
        //append new table to main container
        wikiContainer.append(newTable);
        wikiContainer.append($('<div class="clear"></div>'));
    });
}; 

      $('#demo1').WikipediaWidget('東京');
 

.ajaxLoading {
    margin-top: 50px;
    text-align: center;
}

.wikipediaContainer {
    position: relative;
    min-height: 150px;
    width: 600px;
    padding: 10px;
    border-radius: 5px;
    background: #ddd;
}

.wikipediaContainer .bg {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 135px;
    height: 155px;
    background: no-repeat url('http://upload.wikimedia.org/wikipedia/commons/3/30/Wikipedia_2.0-new_prototype.png');
    opacity: 0.3;
}

.wikipediaContainer .wikipediaTitle {
    text-align: center;
    height: 30px;
    font: 20px Verdana bold;
    border-radius: 5px 5px 0 0;
    background: #fff;
    margin: -5px 0 10px 0;
    line-height: 30px;
}

.wikipediaContainer .wikipediaLogo {
    width: 150px;
    float: left;
    margin-right: 20px;
}

.wikipediaContainer .wikipediaDescription {
    float: left;
    width: 430px;
}

.wikipediaContainer ul.wikipediaThumbGallery {
    float: left;
    width: 600px;
    list-style: none;
    padding: 0;
}

.wikipediaContainer ul.wikipediaThumbGallery li {
    display: inline-block;
    float: left;
    margin: 0 10px 10px 0;
}

.wikipediaContainer table.wikipediaInfoTable {
    float: left;
    width: 600px;
}

.wikipediaContainer .clear {
    clear: both;
} 

  <div id="demo1" class="wikipediaContainer"></div>