source: other-projects/hathitrust/wcsa/extracted-features-solr/trunk/web-portal/index.js@ 31613

//var langs_with_pos =["da","de","en","nl","pt"];
var langs_with_pos =["en","de","pt","da","nl", "sv"];
var langs_without_pos =["af","ar","bg","bn","cs","el","es","et","fa","fi","fr","he","hi","hr","hu","id","it","ja","kn","ko","lt","lv","mk","ml","mr","ne","no","pa","pl","ro","ru","sk","sl","so","sq","sv","sw","ta","te","th","tl","tr","uk","ur","vi","zh-cn","zh-tw"];

var num_rows = 20;

function lang_pos_toggle(event) {
    var $this =$(this);
    var checked_state = $this.prop("checked");

    var id = $this.attr("id");
    var split_id = id.split("-");
    var related_id = split_id[0] + "-pos-choice";

    //console.log("checked state = " + checked_state);

    var disable_state = !checked_state;
    $('#'+related_id + " *").prop('disabled',disable_state);
};

function ajax_error(jqXHR, textStatus, errorThrown) {
    alert('An error occurred... Look at the console (F12 or Ctrl+Shift+I, Console tab) for more information!');

    console.log('jqXHR:' + jqXHR);
    console.log('textStatus:' + textStatus);
    console.log('errorThrown:' + errorThrown);
}       


function add_titles(json_data) {
    $.each( json_data, function( htid_with_prefix, htid_val ) {
    var htid = htid_with_prefix.replace(/^htid:/,"");
    
    $.each(htid_val.records, function( internalid, metadata ) {
        var title = metadata.titles[0];
        $("[name='"+htid+"']").each(function() {$(this).html(title)});
        console.log(htid + ", title = " + metadata.titles[0]);
    });
    });
}

function show_new_results(delta)
{
    $('.search-in-progress').css("cursor","wait");

    var start = parseInt(store_search_args.start)
    
    store_search_args.start = start + parseInt(delta);
        
    $.ajax({
    type: 'GET',
    url: store_search_action,
    data: store_search_args,
    dataType: 'json',
    success: show_results,
    error: ajax_error
    });
}

function stream_generate_item(line,id,title)
{
    var css_class = (line%2 == 0) ? 'class="evenline"' : 'class="oddline"';
    
    var html_item = "";


    var babel_url = "https://babel.hathitrust.org/cgi/pt?id="+id+";view=1up;seq="+1;

    html_item += '<p ' + css_class + '>';
    //html_item += ' <span style="font-style: italic;" name="'+id+'"></span><br>';
    html_item += '<a target="_blank" href="' + babel_url + '">' + id + ': ' + title + '</a>';
    html_item += '</p>';

    return html_item;
}


function generate_item(line,id,id_pages)
{
    var css_class = (line%2 == 0) ? 'class="evenline"' : 'class="oddline"';
    
    var html_item = "";

    var id_pages_len = id_pages.length;
    
    for (var pi=0; pi<id_pages_len; pi++) {
    var page = id_pages[pi];
    
    //var seqnum = page - 1;
    //var seqnum = page + 1;
    var seqnum = page;
    var babel_url = "https://babel.hathitrust.org/cgi/pt?id="+id+";view=1up;seq="+seqnum;

    if (id_pages_len>1) {

        if (pi==0) {
        html_item += '<p ' + css_class + '>';
        html_item += '<span style="font-style: italic;" name="'+id+'"><span style="cursor: progress;">Loading ...</span></span><br>';

        
        html_item += id + ': <a target="_blank" href="' + babel_url + '">seq ' + seqnum + '</a> ';
        }
        else {
        html_item += ', <a target="_blank" href="' + babel_url + '">seq ' + seqnum + '</a> ';
        
        //var result_item = '<a target="_blank" href="' + babel_url + '">' + id + ', seq ' + seqnum + '</a>';
        //result_item += ' <span style="font-style: italic;" name="'+id+'"><span style="cursor: progress;">Loading ...</span></span>';
        //html_item += '<p ' + css_class + '>'+result_item+'</p>';
        }
    }
    else {
        html_item += '<p ' + css_class + '>';
        html_item += ' <span style="font-style: italic;" name="'+id+'"><span style="cursor: progress;">Loading ...</span></span><br>';
        html_item += '<a target="_blank" href="' + babel_url + '">' + id + ', seq ' + seqnum + '</a>';
        html_item += '</p>';
    }
    
    }

    if (id_pages_len>1) {
    html_item += "</p>";
    }

    return html_item;
}

function stream_show_results(jsonData) {
    var docs = jsonData["result-set"].docs;
    var num_docs = docs.length -1;

    $('.search-in-progress').css("cursor","auto");
    
    var $search_results = $('#search-results');

    if (num_docs>0) {
    $search_results.html("<p>Results: " + num_docs + " volumes matched</p>");
    /*
    var from = parseInt(store_search_args.start);
    var to = from + num_rows;
    $search_results.append("<p>Showing matches: "+from+"-" + to + "</p>");
    */
    }
    else {
    $search_results.html("<p>No volumes matched your query</p>");
    }

    for (var i=0; i<num_docs; i++) {
    var doc = docs[i];
    var id = doc.id;
    var title = doc.title_t;

    var html_item = stream_generate_item(i,id,title);
    $search_results.append(html_item);
    }
    return;
    // ****
    
    var htids = [];

    var prev_id = null;
    var prev_pages = [];
    
    var i=0;
    var line_num = 0;
    while (i<num_docs) {
//    for (var i=0; i<num_docs; i++) {
    var doc = docs[i];
    var id_and_page = doc.id.split(".page-");
    var id = id_and_page[0];
    var seqnum = parseInt(id_and_page[1]) +1; // fix up ingest error
    //var page = seqnum+1;
    //var page = seqnum-1;
    var page = seqnum;

    if ((prev_id != null) && (id != prev_id)) {
        // time to output previous item
        var html_item = generate_item(line_num,prev_id,prev_pages);
        $search_results.append(html_item);
        line_num++;
        prev_pages = [page];
    }
    else {
        // accumulate pages
        prev_pages.push(page)
    }
    
    htids.push("htid:"+id);

    prev_id = id;
    i++;
    }
    
    var html_item = generate_item(line_num,prev_id,prev_pages);
    $search_results.append(html_item);

    
    document.location.href="#search-results-anchor";
    
    var next_prev = '<p style="width:100%;"><div id="search-prev" style="float: left;"><a>&lt; Previous</a></div><div id="search-next" style="float: right;"><a>Next &gt;</a></div></p>';
    
    $search_results.append(next_prev);
    $('#search-prev').click(function(event) { show_new_results(-1*num_rows); });
    $('#search-next').click(function(event) { show_new_results(num_rows); });

    var search_start = store_search_args.start;
    if (search_start==0) {
    $('#search-prev').hide();
    }
    
    // Example URL for catalog metadata (multiple items)
    // http://catalog.hathitrust.org/api/volumes/brief/json/id:552;lccn:70628581|isbn:0030110408

    var htids_str = htids.join("|",htids);
    var cat_url = "http://catalog.hathitrust.org/api/volumes/brief/json/" + htids_str;
        $.ajax({
        url: cat_url,
        dataType: 'jsonp',
        jsonpCallback: "add_titles"
    });


    //var json_pretty = JSON.stringify(jsonData.response, null, '\t');
    //$('#search-results').text(json_pretty)
}


function show_results(jsonData) {
    var response = jsonData.response;
    var num_found = response.numFound;
    var docs = response.docs;
    var num_docs = docs.length;

    $('.search-in-progress').css("cursor","auto");
    
    var $search_results = $('#search-results');

    if (num_docs>0) {
    $search_results.html("<p>Results: " + num_found + " pages matched</p>");
    var from = parseInt(store_search_args.start);
    var to = from + num_rows;
    $search_results.append("<p>Showing matches: "+from+"-" + to + "</p>");
    }
    else {
    $search_results.html("<p>No pages matched your query</p>");
    }

    
    // https://babel.hathitrust.org/cgi/pt?id=hvd.hnnssu;view=1up;seq=11

    var htids = [];

    var prev_id = null;
    var prev_pages = [];
    
    var i=0;
    var line_num = 0;
    while (i<num_docs) {
//    for (var i=0; i<num_docs; i++) {
    var doc = docs[i];
    var id_and_page = doc.id.split(".page-");
    var id = id_and_page[0];
    var seqnum = parseInt(id_and_page[1]) +1; // fix up ingest error
    //var page = seqnum+1;
    //var page = seqnum-1;
    var page = seqnum;

    if ((prev_id != null) && (id != prev_id)) {
        // time to output previous item
        var html_item = generate_item(line_num,prev_id,prev_pages);
        $search_results.append(html_item);
        line_num++;
        prev_pages = [page];
    }
    else {
        // accumulate pages
        prev_pages.push(page)
    }
    
//  var css_class = (i%2 == 0) ? 'class="evenline"' : 'class="oddline"';
//  //var restful_safe_id = id.replace(/\./g,",").replace(/:/g, "+").replace(/\//g, "=");
    
//  var babel_url = "https://babel.hathitrust.org/cgi/pt?id="+id+";view=1up;seq="+seqnum;

//  var result_item = '<a target="_blank" href="' + babel_url + '">' + id + ', page ' + page + '</a>';
//  result_item += ' <span style="font-style: italic;" name="'+id+'"><span style="cursor: progress;">Loading ...</span></span>';
//  $search_results.append('<p ' + css_class + '>'+result_item+'</p>');

    htids.push("htid:"+id);

    prev_id = id;
    i++;
    }
    
    var html_item = generate_item(line_num,prev_id,prev_pages);
    $search_results.append(html_item);

    
    document.location.href="#search-results-anchor";
    
    var next_prev = '<p style="width:100%;"><div id="search-prev" style="float: left;"><a>&lt; Previous</a></div><div id="search-next" style="float: right;"><a>Next &gt;</a></div></p>';
    
    $search_results.append(next_prev);
    $('#search-prev').click(function(event) { show_new_results(-1*num_rows); });
    $('#search-next').click(function(event) { show_new_results(num_rows); });

    var search_start = store_search_args.start;
    if (search_start==0) {
    $('#search-prev').hide();
    }
    
    // Example URL for catalog metadata (multiple items)
    // http://catalog.hathitrust.org/api/volumes/brief/json/id:552;lccn:70628581|isbn:0030110408

    var htids_str = htids.join("|",htids);
    var cat_url = "http://catalog.hathitrust.org/api/volumes/brief/json/" + htids_str;
        $.ajax({
        url: cat_url,
        dataType: 'jsonp',
        jsonpCallback: "add_titles"
    });


    //var json_pretty = JSON.stringify(jsonData.response, null, '\t');
    //$('#search-results').text(json_pretty)
}

var store_search_args = null;
var store_search_action = null;

var group_by_vol_checked = 0;


function expand_field_lang_pos(q_text,langs_with_pos,langs_without_pos,search_all_checked)
{
    var fields = [];
    var universal_pos_tags = [ "VERB", "NOUN", "ADJ", "ADV", "ADP", "CONJ", "DET", "NUM", "PRT", "X" ];
    
    for (var li=0; li<langs_with_pos.length; li++) {
    var lang = langs_with_pos[li];
    var lang_enabled_id = lang + "-enabled";
    var $lang_enabled_cb = $('#'+lang_enabled_id);
    if ($lang_enabled_cb.is(':checked')) {
        console.log("Extracting POS tags for: " + lang);
        
        for (var ti=0; ti<universal_pos_tags.length; ti++) {
        var tag = universal_pos_tags[ti];
        var lang_tag_id = lang+"-"+tag+"-htrctoken-cb";
        var $lang_tag_cb = $('#'+lang_tag_id);
        if (search_all_checked || ($lang_tag_cb.is(':checked'))) {          
            var lang_tag_field = lang+"_"+tag+"_htrctoken";
            fields.push(lang_tag_field+":"+q_text);
        }
        }
    }
    }

    for (var li=0; li<langs_without_pos.length; li++) {
    var lang = langs_without_pos[li];
    var lang_enabled_id = lang + "-enabled";
    var $lang_enabled_cb = $('#'+lang_enabled_id);

    if (search_all_checked || ($lang_enabled_cb.is(':checked'))) {
        console.log("Adding in non-POS field for: " + lang);
        var lang_tag_field = lang+"_htrctoken";
        fields.push(lang_tag_field+":"+q_text);     
    }
    }

    var fields_str = fields.join(" OR ");
    
    return fields_str;
}

function expand_query_field_and_boolean(query,langs_with_pos,langs_without_pos,search_all_checked)
{
    // boolean terms
    //  => pos and lang field
    
    var query_terms = query.split(/\s+/);
    var query_terms_len = query_terms.length;

    var bool_query_term = [];

    var i=0;
    var prev_bool = "";

    for (var i=0; i<query_terms_len; i++) {
    var term = query_terms[i];
    if (term.match(/^(and|or)$/i)) {
        prev_bool = term.toUpperCase();     
    }
    else {
        if (i>0) {
        if (prev_bool == "") {
            prev_bool = "AND";
        }
        }
        
        var expanded_term = expand_field_lang_pos(term,langs_with_pos,langs_without_pos,search_all_checked)
        
        term = "(" + expanded_term + ")";

        if (prev_bool != "") {
        bool_query_term.push(prev_bool);
        prev_bool = "";
        }
        bool_query_term.push(term);
    }
    }

    var bool_query = bool_query_term.join(" ");

    return bool_query;
}


function stream_submit_action(event)
{
    event.preventDefault();

    $('.search-in-progress').css("cursor","wait");

    var vq_text     = $('#vq').val();
    
    store_search_action = $('#search-form').attr("action");
    
    var arg_indent = $('#indent').attr('value');
    var arg_wt     = $('#wt').attr('value');
    var arg_start  = $('#start').attr('value');
    var arg_rows   = $('#rows').attr('value');
    var q_text     = $('#q').val();

    group_by_vol_checked = $('#group-results-by-id:checked').length;

    
    if ((q_text === "") && (vq_text === "")) {
    $('.search-in-progress').css("cursor","auto");
    alert("No query term entered");
    return;
    }

    var expr_all = "";
    var expr_md = "";
    var expr_tx = "";
    
    if (vq_text !== "") {
    // simplified case of issuing a volume-based metadata query
    //expr=search(col,q,fl,sort,rows)

    
    //var expr = "expr=search(";
    expr_md = "search(";
    expr_md += "htrc-full-ef20";
    expr_md += ",q=\""+vq_text+"\"";
    expr_md += ",fl=\"volumeid_s,id,title_t\"";
    expr_md += ",sort=\"id asc"+"\"";
    expr_md += ",indent=\""+arg_indent+"\"";
    expr_md += ",wt=\""+arg_wt+"\"";
    expr_md += ",start=\""+arg_start+"\"";
    expr_md += ",rows=\""+arg_rows+"\"";
    expr_md += ")";
    
    store_search_args = { q: vq_text, indent: arg_indent, wt: arg_wt,
                  start: arg_start, rows: arg_rows };
    }

    if (q_text !== "") {
    
    var fields = [];
    var universal_pos_tags = [ "VERB", "NOUN", "ADJ", "ADV", "ADP", "CONJ", "DET", "NUM", "PRT", "X" ];

    var arg_q = "";
    
    var split_q_text = q_text.split(/\s+/);
    for (var qi=0; qi<split_q_text.length; qi++) {
        q_text = split_q_text[qi];
        
        for (var li=0; li<langs_with_pos.length; li++) {
        var lang = langs_with_pos[li];
        var lang_enabled_id = lang + "-enabled";
        var $lang_enabled_cb = $('#'+lang_enabled_id);
        if ($lang_enabled_cb.is(':checked')) {
            console.log("Extracting POS tags for: " + lang);
            
            for (var ti=0; ti<universal_pos_tags.length; ti++) {
            var tag = universal_pos_tags[ti];
            var lang_tag_id = lang+"-"+tag+"-htrctoken-cb";
            var $lang_tag_cb = $('#'+lang_tag_id);
            if ($lang_tag_cb.is(':checked')) {
                //var lang_tag_field = "xxxx"+lang+"_"+tag+"_htrctoken";
                var lang_tag_field = lang+"_"+tag+"_htrctoken";
                fields.push(lang_tag_field+":"+q_text);
            }
            }
        }
        }
        
        for (var li=0; li<langs_without_pos.length; li++) {
        var lang = langs_without_pos[li];
        var lang_enabled_id = lang + "-enabled";
        var $lang_enabled_cb = $('#'+lang_enabled_id);
        
        if ($lang_enabled_cb.is(':checked')) {
            console.log("Adding in non-POS field for: " + lang);
            //var lang_tag_field = "xxxx"+lang+"_htrctoken";
            var lang_tag_field = lang+"_htrctoken";
            fields.push(lang_tag_field+":"+q_text);     
        }
        }
    
        if (fields.length == 0) {
        alert("No languages selected");
        return;
        }

        if (qi>0) {
        arg_q += " OR ";
        }
        
        arg_q += fields.join(" OR ");
    
    } // end of for each split q_text
    
    // Example search on one of the htrc-full-ef fields is: 
    //  q=en_NOUN_htrctoken:farming
    
    store_search_args = { q: arg_q, indent: arg_indent, wt: arg_wt, start: arg_start, rows: arg_rows };

    store_search_args.sort="id asc";
    store_search_args.fl="volumeid_s,id";
    
    var expr_tx = "search(htrc-full-ef20";
    
    for (var k in store_search_args) {
        if (store_search_args.hasOwnProperty(k)) {
        var v = store_search_args[k];
        expr_tx += "," + k + "=\"" + v + "\"";
        }
    }
    expr_tx += ")";
    }
    

    if ((expr_md != "") && (expr_tx != "")) {
    expr = "expr=intersect(" + expr_md + "," + expr_tx  + ", on=\"id=volumeid_s\")";
    }
    else if (expr_md != "") {
    expr = "expr=" + expr_md;
    }
    else if (expr_tx != "") {
    expr = "expr=" + expr_tx;
    }
    else {
    // both empty
    console.log("Warning: query was empty");
    }
    

    $.ajax({
    type: 'GET',
    url: store_search_action,
    data: expr,
    dataType: 'json',
    success: stream_show_results,
    error: ajax_error
    });

}

function submit_action(event)
{
    event.preventDefault();

    $('.search-in-progress').css("cursor","wait");
    
    store_search_action = $('#search-form').attr("action");
    
    var arg_indent = $('#indent').attr('value');
    var arg_wt     = $('#wt').attr('value');
    var arg_start  = $('#start').attr('value');
    var arg_rows   = $('#rows').attr('value');
    var q_text     = $('#q').val();

    group_by_vol_checked = $('#group-results-by-id:checked').length;
    var search_all_checked = $('#search-all-langs:checked').length;
    console.log("*** search all checked = " + search_all_checked);
    
    if (q_text === "") {
    $('.search-in-progress').css("cursor","auto");
    alert("No query term entered");
    return;
    }

    arg_q = expand_query_field_and_boolean(q_text,langs_with_pos,langs_without_pos,search_all_checked);

    if (arg_q == "") {
    $('.search-in-progress').css("cursor","auto");
    alert("No languages selected");
    return;
    }
    
    /*
    var fields = [];
    var universal_pos_tags = [ "VERB", "NOUN", "ADJ", "ADV", "ADP", "CONJ", "DET", "NUM", "PRT", "X" ];
    
    for (var li=0; li<langs_with_pos.length; li++) {
    var lang = langs_with_pos[li];
    var lang_enabled_id = lang + "-enabled";
    var $lang_enabled_cb = $('#'+lang_enabled_id);
    if ($lang_enabled_cb.is(':checked')) {
        console.log("Extracting POS tags for: " + lang);
        
        for (var ti=0; ti<universal_pos_tags.length; ti++) {
        var tag = universal_pos_tags[ti];
        var lang_tag_id = lang+"-"+tag+"-htrctoken-cb";
        var $lang_tag_cb = $('#'+lang_tag_id);
        if (search_all_checked || ($lang_tag_cb.is(':checked'))) {          
            var lang_tag_field = lang+"_"+tag+"_htrctoken";
            fields.push(lang_tag_field+":"+q_text);
        }
        }
    }
    }

    for (var li=0; li<langs_without_pos.length; li++) {
    var lang = langs_without_pos[li];
    var lang_enabled_id = lang + "-enabled";
    var $lang_enabled_cb = $('#'+lang_enabled_id);

    if (search_all_checked || ($lang_enabled_cb.is(':checked'))) {
        console.log("Adding in non-POS field for: " + lang);
        var lang_tag_field = lang+"_htrctoken";
        fields.push(lang_tag_field+":"+q_text);     
    }
    }
    */

    /*
    if (fields.length == 0) {
    $('.search-in-progress').css("cursor","auto");
    alert("No languages selected");
    return;
    }
    
    var arg_q = fields.join(" OR ");
    */
    
    // Example search on one of the htrc-full-ef fields is: 
    //  q=en_NOUN_htrctoken:farming
    
    store_search_args = { q: arg_q, indent: arg_indent, wt: arg_wt, start: arg_start, rows: arg_rows };

    if (group_by_vol_checked) {
    store_search_args.sort="id asc";
    }
    
    
    $.ajax({
    type: 'GET',
    url: store_search_action,
    data: store_search_args,
    dataType: 'json',
    success: show_results,
    error: ajax_error
    });

}

function generate_pos_langs()
{
    var pos_checkbox = [
    { pos:"VERB", label:"Verbs",       tooltip:"Verbs (all tenses and modes)" },
    { pos:"NOUN", label:"Nouns",       tooltip:"Nouns (common and proper)" },
    { pos:"ADJ",  label:"Adjectives",  tooltip: null }, 
    { pos:"ADV",  label:"Adverbs",     tooltip: null },
    { pos:"ADP",  label:"Adpositions", tooltip:"Adpositions (prepositions and postpositions)" },
    { pos:"CONJ", label:"Conjunctions",tooltip: null },
    { pos:"DET",  label:"Determiners", tooltip: null },
    { pos:"NUM",  label:"Numbers",     tooltip:"Cardinal numbers" },
    { pos:"PRT",  label:"Particles",   tooltip:"Particles or other function words" },
    { pos:"X",    label:"Other",       tooltip:"Other words, such as foreign words, typos, abbreviations"}
    ];

    var $pos_fieldsets = $('#pos-fieldsets');
    
    for (var li=0; li<langs_with_pos.length; li++) {

    var l = langs_with_pos[li];
    var lang_full = isoLangs[l].name;
    var lang_native_full = isoLangs[l].nativeName;
    var opt_title = (lang_full !== lang_native_full) ? 'title="'+lang_native_full+'"' : "";

    var opt_enabled = (l == "en") ? 'checked="checked"' : "";
    
    var legend = "";
    legend += '    <legend style="margin-bottom: 5px; padding-top: 15px;">\n';
    legend += '      <input type="checkbox" name="'+l+'-enabled" id="'+l+'-enabled" ' + opt_enabled +'/>\n';
    legend += '      <span ' + opt_title + '>'+lang_full+':</span>\n';
    legend += '    </legend>\n';
    

    var check_box_list = [];
        
    for (var pi=0; pi<pos_checkbox.length; pi++) {
        var pos_info = pos_checkbox[pi];
        var pos = pos_info.pos;
        var label = pos_info.label;
        var tooltip = pos_info.tooltip;
        var opt_tooltip = (tooltip != null) ? 'title="'+tooltip+'"' : "";
        
        var check_box = "";
        check_box += '    <input type="checkbox" name="'+l+'-'+pos+'-htrctoken-cb" id="'+l+'-'+pos+'-htrctoken-cb" checked="checked" />\n';
        check_box += '    <label for="'+l+'-'+pos+'-htrctoken-cb" '+opt_tooltip+'>'+label+'</label>\n';

        check_box_list.push(check_box);
    }
    
    var fieldset = "";
    var opt_showhide_class = (li>0) ? 'class="show-hide-lang"' : "";

    if (li==1) {
        fieldset += '<button id="show-hide-lang">Show other languages ...</button>';
    }
    
    fieldset += '<fieldset ' + opt_showhide_class + '>\n';
    fieldset += legend;
    fieldset += '  <div id="'+l+'-pos-choice">\n';

    var check_box_join = check_box_list.join('&nbsp;');
    fieldset += check_box_join;
    
    fieldset += '  </div>\n';
    fieldset += '</fieldset>\n';
    
    $pos_fieldsets.append(fieldset);
    $('#'+l+'-enabled').click(lang_pos_toggle);

    if (l == "en") {
        $('#en-pos-choice *').prop('disabled',false);
    }
    else {
        $('#'+l+'-pos-choice *').prop('disabled',true);
    }
    }


    //$('#en-enabled').click(lang_pos_toggle);
    //$('#de-enabled').click(lang_pos_toggle);
    //$('#de-pos-choice *').prop('disabled',true);

    show_hide_lang()
}

function show_hide_lang()
{
    $( "#show-hide-lang" ).click(function(event) {
    event.preventDefault(); 
    if($('.show-hide-lang:visible').length) {
        $('.show-hide-lang').hide("slide", {direction: "up" } , 1000);
        $('#show-hide-lang').html("Show other languages ...");
    }
    else {
        $('.show-hide-lang').show("slide", {direction: "up" } , 1000);
        $('#show-hide-lang').html("Hide other languages ...");
    }
    });
}

function generate_other_langs()
{
    // setup other languages
    // for each 'langs_without_pos' generate HTML of the form:
    //    <input type="checkbox" name="fr-enabled" id="fr-enabled" />French
    var $other_langs = $('#other-langs');

    for (var i=0; i<langs_without_pos.length; i++) {
    var lang = langs_without_pos[i];
    //var labeled_checkbox = '<span style="white-space:nowrap;">\n';
    var labeled_checkbox = '<nobr>';
    
    labeled_checkbox += '<input type="checkbox" name="'+lang+'-enabled" id="'+lang+'-enabled" />';
    /*
    if (lang === "zh-cn") {
        console.log("Mapping zh-cn => zh");
        lang = "zh";
    }
    if (lang === "zh-tw") {
        console.log("Mapping zh-tw => zh");
        lang = "zh";
    }
*/
    var lang_full = isoLangs[lang].name;
    var lang_native_full = isoLangs[lang].nativeName;
    var opt_title = (lang_full !== lang_native_full) ? 'title="'+lang_native_full+'"' : "";
    
    labeled_checkbox += '<label for="'+lang+'-enabled" style="padding-left: 5px; padding-right: 10px;" ' + opt_title + '>'+lang_full+'</label>';
    //labeled_checkbox += '</span>\n';
    labeled_checkbox += '</nobr> ';
    
    $other_langs.append(labeled_checkbox);
    
    }
}

$(function() {
    generate_pos_langs();

    generate_other_langs();

    if ($('#search-submit').length>0) {
    $('#search-submit').click(submit_action);
    }
    
    if ($('#stream-search-submit').length>0) {
    $('#stream-search-submit').click(stream_submit_action);
    }

});