mmmturkeybacon Color Coded Search with Checkpoints

Changes the title row of a HIT's description to match the average of it's Turkopticon ratings. Changes the color of the reward amount to match the color of the Turkopticon rating for pay. Adds colored checkboxes to show/hide HITs by color rating. Adds a gray checkbox to show only HITs for which you are not qualified. Changes the background color of the HIT title and link to white for Master's HITs. Changes the color of HITs for which you are not qualified to a darker gray. And more!
当前为 2015-03-28 提交的版本，查看最新版本。
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// ==UserScript==
// @name        mmmturkeybacon Color Coded Search with Checkpoints
// @author      mmmturkeybacon
// @description Changes the title row of a HIT's description to match the average of it's Turkopticon ratings. Changes the color of the reward amount to match the color of the Turkopticon rating for pay. Adds colored checkboxes to show/hide HITs by color rating. Adds a gray checkbox to show only HITs for which you are not qualified. Changes the background color of the HIT title and link to white for Master's HITs. Changes the color of HITs for which you are not qualified to a darker gray. And more!
// Changes the color of visited links to black. Automatically clicks "Show all details". Adds checkboxes next to HIT links so that you can set a checkpoint. A checkpoint will notify you that you've already seen a HIT by changing the HIT link to display the date the checkpoint was set. A well-placed checkpoint is useful when browsing HITs by creation date (newest first) because it will alert you that you've already seen the checkpoint HIT and probably all the HITs that come after it. It's best to place a checkpoint on a HIT that won't be recreated because recreated HITs jump to the first page. This script is not a substitute for actually reading Turkopticon reviews.
// @namespace   http://userscripts.org/users/523367
// @match       https://*.mturk.com/mturk/viewhits*
// @match       https://*.mturk.com/mturk/findhits*
// @match       https://*.mturk.com/mturk/sorthits*
// @match       https://*.mturk.com/mturk/searchbar*
// @match       https://*.mturk.com/mturk/viewsearchbar*
// @match       https://*.mturk.com/mturk/sortsearchbar*
// @match       https://*.mturk.com/mturk/preview?*
// @match       https://*.mturk.com/mturk/return*
// @require     https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js
// @version     3.15
// @grant       GM_xmlhttpRequest
// @grant       GM_getValue
// @grant       GM_setValue
// @grant       GM_deleteValue
// ==/UserScript==
 
/**********************************************************************/
/* NB: turkopticon.ucsd.edu (TO website) uses yellow for a rating between 2 and 3,
 *     but TO extension uses orange
 *
 * Turkopticon scale
 * green : 3 < average <= 5
 * orange: 2 < average <= 3
 * red   : 1 < average <= 2
 *
 * Color Coded Search scale (so that green represents the very best HITs)
 * green : 4 < average <= 5
 * yellow: 3 < average <= 4  yellow are OK HITs, that's why the yellow has a touch of green
 * orange: 2 < average <= 3
 * red   : 1 < average <= 2
 */
 
var GREEN   = '#66CC66'; //  (4,5]
//var YELLOW  = '#FFFF00'; // (3,4]  yellow
//var YELLOW  = '#CDFF2F'; // (3,4]  yellow with hint of green
var YELLOW  = '#ADFF2F'; // (3,4]  green yellow
//var YELLOW  = '#9CE62A'; // (3,4]  darker green yello
var ORANGE  = '#FF9900'; // (2,3]
//var RED     = '#FF0000'; // (1,2]
var RED     = '#FF3030'; // (1,2]
var BLUE    = '#7FAAEB'; // no rating
 
var VISITED_LINK = '#000000'; // black
var MASTERS = '#FFFFFF'; // white
//var MASTERS = '#B56CFF'; // purple
 
var NEW_NOTQUAL_BODY = '#A9AAA4'; // dark grey
 
var COMM_WEIGHT = 1;
var PAY_WEIGHT  = 3;
var FAIR_WEIGHT = 3;
var FAST_WEIGHT = 1;
 
var CHECKPOINT_COLOR = '#000000'; // black
//var CHECKPOINT_COLOR = '#00AAAA'; // dark green-blue
var CHECKPOINT_MESSAGE = 'CHECKPOINT REACHED!';
//var CHECKPOINT_MESSAGE = 'YOU SHALL NOT PASS!';
 
var SHOW_ALL_DETAILS = true;
 
/**********************************************************************/
 
// URLs for testing, learning parameters
//http://mturk-api.istrack.in/multi-attrs.php?ids=ABSF8UXFZYEK6
//http://data.istrack.in/turkopticon.php?data=2.57,2.31,2.89,2.71
 
var TIMEOUT = 10000; // [ms] milliseconds, 0 means wait forever
 
var API_BASE = 'https://turkopticon.ucsd.edu/api/';
var API_MULTI_ATTRS_URL = API_BASE + 'multi-attrs.php?ids=';
 
var API_PROXY_BASE = 'https://mturk-api.istrack.in/';
var API_PROXY_MULTI_ATTRS_URL = API_PROXY_BASE + 'multi-attrs.php?ids=';
 
var REVIEWS_BASE = 'http://turkopticon.ucsd.edu/';
var HIT_GROUPS_BASE_LINK = '/mturk/searchbar?selectedSearchType=hitgroups&requesterId=';
 
var NOTQUAL_BODY = '#F1F3EB';
 
var qual_checkbox;
var notqual_checkbox;
var green_checkbox;
var yellow_checkbox;
var orange_checkbox;
var red_checkbox;
var blue_checkbox;
var $parent_tables;
 
function process_TO_data(requester_data)
{
    var average = 0;
    var comm_rnd = 0;
    var pay_rnd = 0;
    var fair_rnd = 0;
    var fast_rnd = 0;
    var reviews = 0;
    var tos = 0;
 
    // after the API update, this if isn't necessary. leaving it in until
    // sure API is stable
    if (requester_data)
    {
        var comm = requester_data.attrs.comm;
        var pay = requester_data.attrs.pay;
        var fair = requester_data.attrs.fair;
        var fast = requester_data.attrs.fast;
        var sum = 0;
        var divisor = 0;
 
        if (comm > 0)
        {
            sum += COMM_WEIGHT*comm;
            divisor += COMM_WEIGHT;
        }
        if (pay > 0)
        {
            sum += PAY_WEIGHT*pay;
            divisor += PAY_WEIGHT;
        }
        if (fair > 0)
        {
            sum += FAIR_WEIGHT*fair;
            divisor += FAIR_WEIGHT;
        }
        if (fast > 0)
        {
            sum += FAST_WEIGHT*fast;
            divisor += FAST_WEIGHT;
        }
        if (divisor > 0)
        {
            average = sum/divisor;
        }
 
        comm_rnd = Math.round(comm*4)/4;
        pay_rnd = Math.round(pay*4)/4;
        fair_rnd = Math.round(fair*4)/4;
        fast_rnd = Math.round(fast*4)/4;
        
        if (requester_data.reviews)
        {
            reviews = requester_data.reviews;
        }
        if (requester_data.tos_flags)
        {
            tos = requester_data.tos_flags;
        }
    }
 
    comm_rnd = comm_rnd.toFixed(2);
    pay_rnd = pay_rnd.toFixed(2);
    fair_rnd = fair_rnd.toFixed(2);
    fast_rnd = fast_rnd.toFixed(2);
 
    return {comm_rnd:comm_rnd, pay_rnd:pay_rnd, fair_rnd:fair_rnd, fast_rnd:fast_rnd, reviews:reviews, tos:tos, average:average};
}
 
function determine_color(rating)
{
    // The lowest rating that can be given is a 1.
    // green  is (4,5]
    // yellow is (3,4]
    // orange is (2,3]
    // red    is (1,2]
    // blue   is 0 (no rating)
    // (0,1) is no man's land but I set the lower bound for red to 0 to agree with data.istrack.in
 
    var color = BLUE;
 
    if (rating > 4)
    {
        color = GREEN;
    }
    else if (rating > 3)
    {
        color = YELLOW;
    }
    else if (rating > 2 )
    {
        color = ORANGE;
    }
    else if (rating > 0)
    {
        color = RED;
    }
 
    return color;
}
 
function show_hide_color(color)
{
    if (notqual_checkbox.checked == true)
    {
        var $color_subset_tables = $parent_tables.filter('[title_color='+color+'][qualified_for="false"][hideable!=false]');
    }
    else
    {
        var $color_subset_tables = $parent_tables.filter('[title_color='+color+'][hideable!=false]');
    }
    
    switch(color)
    {
        case GREEN:
        {
            GM_setValue('green_checkbox_checked', green_checkbox.checked);
            if (green_checkbox.checked == false)
            {
                $color_subset_tables.each(function()
                {
                    $(this).hide();
                });
            }
            else
            {
                $color_subset_tables.each(function()
                {
                    $(this).show();
                });
            }
            break;
        }
        case YELLOW:
        {
            GM_setValue('yellow_checkbox_checked', yellow_checkbox.checked);
            if (yellow_checkbox.checked == false)
            {
                $color_subset_tables.each(function()
                {
                    $(this).hide();
                });
            }
            else
            {
                $color_subset_tables.each(function()
                {
                    $(this).show();
                });
            }
            break;
        }
        case ORANGE:
        {
            GM_setValue('orange_checkbox_checked', orange_checkbox.checked);
            if (orange_checkbox.checked == false)
            {            
                $color_subset_tables.each(function()
                {
                    $(this).hide();
                });
            }
            else
            {
                $color_subset_tables.each(function()
                {
                    $(this).show();
                });
            }
            break;
        }
        case RED:
        {
            GM_setValue('red_checkbox_checked', red_checkbox.checked);
            if (red_checkbox.checked == false)
            {
                $color_subset_tables.each(function()
                {
                    $(this).hide();
                });
            }
            else
            {
                $color_subset_tables.each(function()
                {
                    $(this).show();
                });
            }
            break;
        }
        case BLUE:
        {
            GM_setValue('blue_checkbox_checked', blue_checkbox.checked);
            if (blue_checkbox.checked == false)
            {
                $color_subset_tables.each(function()
                {
                    $(this).hide();
                });
            }
            else
            {
                $color_subset_tables.each(function()
                {
                    $(this).show();
                });
            }
            break;
        }
    }
}
 
function show_hide_all_colors()
{
    show_hide_color(GREEN);
    show_hide_color(YELLOW);
    show_hide_color(ORANGE);
    show_hide_color(RED);
    show_hide_color(BLUE);
}
 
function show_hide_qual()
{
    GM_setValue('notqual_checkbox_checked', notqual_checkbox.checked);
    if (notqual_checkbox.checked == true)
    {
        $parent_tables.filter('[qualified_for="true"][hideable!=false]').each(function()
        {
            $(this).hide();
        });
    }
    else
    {
        show_hide_all_colors();
    }
}
 
function set_checkpoint(e)
{
    var caller = e.target || e.srcElement;
 
    if (caller.checked)
    {
        var d = new Date();
        GM_setValue(caller.name+'_checked', caller.checked);
        GM_setValue(caller.name+'_date', '['+d.toLocaleDateString()+'] ');
    }
    else
    {
        GM_deleteValue(caller.name+'_checked');
        GM_deleteValue(caller.name+'_date');
    }
}
 
function create_colored_checkboxes()
{
    var checkbox_div = document.createElement('DIV');
    var notqual_div = document.createElement('DIV');
    var green_div = document.createElement('DIV');
    var yellow_div = document.createElement('DIV');
    var orange_div = document.createElement('DIV');
    var red_div = document.createElement('DIV');
    var blue_div = document.createElement('DIV');
    notqual_div.style.cssText = 'display:inline-block; background-color: '+NEW_NOTQUAL_BODY+';'
    green_div.style.cssText = 'display:inline-block; background-color: '+GREEN+';'
    yellow_div.style.cssText = 'display:inline-block; background-color: '+YELLOW+';'
    orange_div.style.cssText = 'display:inline-block; background-color: '+ORANGE+';'
    red_div.style.cssText = 'display:inline-block; background-color: '+RED+';'
    blue_div.style.cssText = 'display:inline-block; background-color: '+BLUE+';'
 
    notqual_checkbox = document.createElement('INPUT');
    green_checkbox = document.createElement('INPUT');
    yellow_checkbox = document.createElement('INPUT');
    orange_checkbox = document.createElement('INPUT');
    red_checkbox = document.createElement('INPUT');
    blue_checkbox = document.createElement('INPUT');
    
    notqual_checkbox.type = 'checkbox';
    green_checkbox.type = 'checkbox';
    yellow_checkbox.type = 'checkbox';
    orange_checkbox.type = 'checkbox';
    red_checkbox.type = 'checkbox';
    blue_checkbox.type = 'checkbox';
    
    notqual_checkbox.checked = GM_getValue('notqual_checkbox_checked', false);
    green_checkbox.checked = GM_getValue('green_checkbox_checked', true);
    yellow_checkbox.checked = GM_getValue('yellow_checkbox_checked', true);
    orange_checkbox.checked = GM_getValue('orange_checkbox_checked', true);
    red_checkbox.checked = GM_getValue('red_checkbox_checked', true);
    blue_checkbox.checked = GM_getValue('blue_checkbox_checked', true);
    
    notqual_checkbox.name = 'notqual_checkbox';
    green_checkbox.name = 'green_checkbox';
    yellow_checkbox.name = 'yellow_checkbox';
    orange_checkbox.name = 'orange_checkbox';
    red_checkbox.name = 'red_checkbox';
    blue_checkbox.name = 'blue_checkbox';
    
    notqual_checkbox.title = 'Only show HITs for which you are not qualified';
    green_checkbox.title = 'Show/Hide green';
    yellow_checkbox.title = 'Show/Hide yellow';
    orange_checkbox.title = 'Show/Hide orange';
    red_checkbox.title = 'Show/Hide red';
    blue_checkbox.title = 'Show/Hide no TO';
    
    notqual_checkbox.addEventListener('click', show_hide_qual);
    green_checkbox.addEventListener('click', function(){show_hide_color(GREEN);});
    yellow_checkbox.addEventListener('click', function(){show_hide_color(YELLOW);});
    orange_checkbox.addEventListener('click', function(){show_hide_color(ORANGE);});
    red_checkbox.addEventListener('click', function(){show_hide_color(RED);});
    blue_checkbox.addEventListener('click', function(){show_hide_color(BLUE);});
 
    notqual_div.appendChild(notqual_checkbox);
    green_div.appendChild(green_checkbox);
    yellow_div.appendChild(yellow_checkbox);
    orange_div.appendChild(orange_checkbox);
    red_div.appendChild(red_checkbox);
    blue_div.appendChild(blue_checkbox);
    
    checkbox_div.align = 'center';
    checkbox_div.appendChild(notqual_div);
    checkbox_div.appendChild(green_div);
    checkbox_div.appendChild(yellow_div);
    checkbox_div.appendChild(orange_div);
    checkbox_div.appendChild(red_div);
    checkbox_div.appendChild(blue_div);
    
    return checkbox_div;
}
 
 
function color_code($parent_tables, api_base, requester_IDs_csv)
{
    GM_xmlhttpRequest(
    {
        method: 'GET',
        url: api_base+requester_IDs_csv,
        timeout: TIMEOUT,
        onload: function (results)
        {
            var rdata = $.parseJSON(results.responseText);
 
            var checkbox_div = create_colored_checkboxes();
            $('table[cellspacing="0"][cellpadding="0"][border="0"][style="margin:5px; clear:both;"]').eq(1).after(checkbox_div);
 
            $parent_tables.each(function()
            {
                var $requester_ID_link = $(this).find('a[href^="'+HIT_GROUPS_BASE_LINK+'"]').attr('href');
                var requester_ID = $requester_ID_link.replace(HIT_GROUPS_BASE_LINK,'');
                var title_row = $(this).find('tr').eq(1);
                var link_bgcolor = $(this).find('td[width="100%"][valign="middle"][height="20"][align="left"]').attr('bgcolor');
 
                var pdata = process_TO_data(rdata[requester_ID]);
                var title_color = determine_color(pdata.average);
                var qualified_for = !($(this).find('a[href^="/mturk/notqualified?"]').length > 0);
 
                $(this).attr('title_color', title_color);
                $(this).attr('qualified_for', qualified_for);
 
                //var $title_line = $(this).find('td[width="100%"][valign="middle"][height="20"][align="left"]');
                //$title_line.css('background-color', title_color);
                $(this).find('td[valign="middle"][nowrap=""][align="left"]').css('background-color', title_color);
                $(this).find('td[valign="middle"][align="left"]').css('background-color', title_color);
                $(this).find('td[width="100%"][valign="middle"][nowrap=""][align="right"]').css('background-color', title_color);
                //$(this).find('a[href^="/mturk/preview?groupId="]').css('background-color', link_bgcolor);
 
                var link_href = REVIEWS_BASE + requester_ID;
                var link_text = pdata.reviews + ((pdata.reviews != 1) ? ' reviews ' : ' review ');
                //link_text = '['+link_text + '|comm: '+pdata.comm_rnd+'|pay: '+pdata.pay_rnd+'|fair: '+pdata.fair_rnd+'|fast: '+pdata.fast_rnd+'|tos: '+pdata.tos+']';
                link_text = '['+link_text + '|pay: '+pdata.pay_rnd+'|fair: '+pdata.fair_rnd+'|comm: '+pdata.comm_rnd+'|fast: '+pdata.fast_rnd+'|tos: '+pdata.tos+']';
                var link = '<a href="'+link_href+'" target="_blank">'+link_text+'</a>&nbsp;';
                title_row.after('<tr><td width="1" valign="middle" bgcolor="#336699" align="center"></td><td width="18" valign="middle" bgcolor="'+link_bgcolor+'" align="center"></td><td width="100%" valign="top" bgcolor="'+title_color+'" align="right">'+link+'</td><td width="8" valign="middle" bgcolor="'+link_bgcolor+'" align="center"></td><td width="1" valign="middle" bgcolor="#336699" align="center"></td></tr>');
 
                // after the API update, this if isn't necessary. leaving it in until
                // sure API is stable
                var pay = 0;
                if (rdata[requester_ID])
                {
                    pay = rdata[requester_ID].attrs.pay;
                }
                var pay_color = determine_color(pay);
                //var pay_color = determine_color(rdata[requester_ID].attrs.pay);
                $(this).find('span[class="reward"]').css('background-color', pay_color);
 
                // highlight Masters HITs title and link
                var is_masters = $(this).find('td[style="padding-right: 2em; white-space: nowrap;"]:contains("Masters")').length > 0;
                if (is_masters)
                {
                    $(this).find('td[valign="middle"][nowrap=""][align="left"]').css('background-color', MASTERS);
                    $(this).find('a[href^="/mturk/preview?groupId="]').css('background-color', MASTERS);
                }
 
                // create checkpoints
                var $preview_link = $(this).find('a:contains("View a HIT in this group")');
                var groupId = $preview_link.attr('href')
                groupId = (groupId) ? groupId.split('=')[1] : $(this).find('a[href^="/mturk/notqualified?hitGroupId="]').attr('href').split(/=|&/)[1];
                var checkbox = document.createElement('INPUT');
                checkbox.type = 'checkbox';
                checkbox.name = groupId;
                checkbox.title = 'Set a checkpoint to help remember a HIT you\'ve seen before.\nUseful when browsing by HIT Creation Date.';
                checkbox.checked = GM_getValue(checkbox.name+'_checked', false);
                checkbox.addEventListener('click', set_checkpoint);  
                checkbox.style.cssText ='vertical-align:middle;';
                $preview_link.after(checkbox);
                // mark checkpoints
                if (checkbox.checked == true)
                {
                    var checkpoint_date = GM_getValue(checkbox.name+'_date');
                    $preview_link.text(checkpoint_date+CHECKPOINT_MESSAGE);
                    $(this).attr('hideable', false);
                    $(this).css('border', '50px solid '+CHECKPOINT_COLOR);
                }
            });
            show_hide_all_colors();
            show_hide_qual();
        },
        ontimeout: function()
        {
            if (api_base == API_MULTI_ATTRS_URL)
            { // tried main api server and failed, now try mirror
                color_code($parent_tables, API_PROXY_MULTI_ATTRS_URL, requester_IDs_csv);
            }
            else
            { // tried mirror and failed, add basic link to reviews and checkpoints
                $parent_tables.each(function()
                {
                    var $requester_ID_link = $(this).find('a[href^="'+HIT_GROUPS_BASE_LINK+'"]').attr('href');
                    var requester_ID = $requester_ID_link.replace(HIT_GROUPS_BASE_LINK,'');
                    var title_row = $(this).find('tr').eq(1);
                    var link_bgcolor = $(this).find('td[width="100%"][valign="middle"][height="20"][align="left"]').attr('bgcolor');
 
                    var link_href = REVIEWS_BASE + requester_ID;
                    var link_text = 'Turkopticon reviews';
                    var link = '<a href="'+link_href+'" target="_blank">'+link_text+'</a>&nbsp;';
                    title_row.after('<tr><td width="1" valign="middle" bgcolor="#336699" align="center"></td><td width="18" valign="middle" bgcolor="'+link_bgcolor+'" align="center"></td><td width="100%" valign="top" bgcolor="'+link_bgcolor+'" align="right">'+link+'</td><td width="8" valign="middle" bgcolor="'+link_bgcolor+'" align="center"></td><td width="1" valign="middle" bgcolor="#336699" align="center"></td></tr>');
 
                    // create checkpoints
                    var $preview_link = $(this).find('a:contains("View a HIT in this group")');
                    var groupId = $preview_link.attr('href')
                    groupId = (groupId) ? groupId.split('=')[1] : $(this).find('a[href^="/mturk/notqualified?hitGroupId="]').attr('href').split(/=|&/)[1];
                    var checkbox = document.createElement('INPUT');
                    checkbox.type = 'checkbox';
                    checkbox.name = groupId;
                    checkbox.title = 'Set a checkpoint to help remember a HIT you\'ve seen before.\nUseful when browsing by HIT Creation Date.';
                    checkbox.checked = GM_getValue(checkbox.name+'_checked', false);
                    checkbox.addEventListener('click', set_checkpoint);  
                    checkbox.style.cssText ='vertical-align:middle;';
                    $preview_link.after(checkbox);
                    // mark checkpoints
                    if (checkbox.checked == true)
                    {
                        var checkpoint_date = GM_getValue(checkbox.name+'_date');
                        $preview_link.text(checkpoint_date+CHECKPOINT_MESSAGE);
                        $(this).attr('hideable', false);
                        $(this).css('border', '50px solid '+CHECKPOINT_COLOR);
                    }
                });
            }
        },
        onerror: function()
        {
            if (api_base == API_MULTI_ATTRS_URL)
            { // tried main api server and failed, now try mirror
                color_code($parent_tables, API_PROXY_MULTI_ATTRS_URL, requester_IDs_csv);
            }
            else
            { // tried mirror and failed, add basic link to reviews and checkpoints
                $parent_tables.each(function()
                {
                    var $requester_ID_link = $(this).find('a[href^="'+HIT_GROUPS_BASE_LINK+'"]').attr('href');
                    var requester_ID = $requester_ID_link.replace(HIT_GROUPS_BASE_LINK,'');
                    var title_row = $(this).find('tr').eq(1);
                    var link_bgcolor = $(this).find('td[width="100%"][valign="middle"][height="20"][align="left"]').attr('bgcolor');
 
                    var link_href = REVIEWS_BASE + requester_ID;
                    var link_text = 'Turkopticon reviews';
                    var link = '<a href="'+link_href+'" target="_blank">'+link_text+'</a>&nbsp;';
                    title_row.after('<tr><td width="1" valign="middle" bgcolor="#336699" align="center"></td><td width="18" valign="middle" bgcolor="'+link_bgcolor+'" align="center"></td><td width="100%" valign="top" bgcolor="'+link_bgcolor+'" align="right">'+link+'</td><td width="8" valign="middle" bgcolor="'+link_bgcolor+'" align="center"></td><td width="1" valign="middle" bgcolor="#336699" align="center"></td></tr>');
 
                    // create checkpoints
                    var $preview_link = $(this).find('a:contains("View a HIT in this group")');
                    var groupId = $preview_link.attr('href')
                    groupId = (groupId) ? groupId.split('=')[1] : $(this).find('a[href^="/mturk/notqualified?hitGroupId="]').attr('href').split(/=|&/)[1];
                    var checkbox = document.createElement('INPUT');
                    checkbox.type = 'checkbox';
                    checkbox.name = groupId;
                    checkbox.title = 'Set a checkpoint to help remember a HIT you\'ve seen before.\nUseful when browsing by HIT Creation Date.';
                    checkbox.checked = GM_getValue(checkbox.name+'_checked', false);
                    checkbox.addEventListener('click', set_checkpoint);  
                    checkbox.style.cssText ='vertical-align:middle;';
                    $preview_link.after(checkbox);
                    // mark checkpoints
                    if (checkbox.checked == true)
                    {
                        var checkpoint_date = GM_getValue(checkbox.name+'_date');
                        $preview_link.text(checkpoint_date+CHECKPOINT_MESSAGE);
                        $(this).attr('hideable', false);
                        $(this).css('border', '50px solid '+CHECKPOINT_COLOR);
                    }
                });
            }
        }
    });
}
 
//$(document).ready(function()
//{
    var is_HIT = $('input[type="hidden"][name="isAccepted"]').length > 0;
    if (is_HIT)
    {
        throw new Error('Not on a search page. Exit.');
    }
 
    // change visited link color to make it easier to differentiate from unvisited link
    // code snippet from http://stackoverflow.com/questions/7030289/how-to-set-link-visited-color-in-jquery
    var visited_link_styling = '<style> a:visited {color:'+VISITED_LINK+';} </style>';
    $('head').append(visited_link_styling);
    // end snippet
 
    if (SHOW_ALL_DETAILS)
    {
        // click 'Show all details'
        $(window).load(function(){$('a[id="expandall"][class="footer_links"][href="#"]:contains("Show all details")').get(0).click();});
    }
 
    // change color of HITs not qualified for to make it easier to differentiate
    $('[bgcolor="'+NOTQUAL_BODY+'"]').each(function(){
        $(this).attr('bgcolor',$(this).attr('bgcolor').replace(NOTQUAL_BODY, NEW_NOTQUAL_BODY));
    }); 
 
    var requester_IDs = new Array();
    
    $parent_tables = $('table[width="100%"][cellspacing="0"][cellpadding="0"][border="0"][height="100%"]');
    $parent_tables.each(function()
    {
        var $requester_ID_link = $(this).find('a[href^="'+HIT_GROUPS_BASE_LINK+'"]').attr('href');
        requester_IDs.push($requester_ID_link.replace(HIT_GROUPS_BASE_LINK,''));
    });
 
    // code snippet from http://stackoverflow.com/questions/5381621/jquery-function-to-get-all-unique-elements-from-an-array
    requester_IDs = requester_IDs.filter(function(itm,i,a)
    {
        return i==a.indexOf(itm);
    });
    // end snippet
 
    var requester_IDs_csv = '';
    for (var i = 0; i < requester_IDs.length-1; i++)
    {
        requester_IDs_csv += requester_IDs[i] + ','
    }
    requester_IDs_csv += requester_IDs[i];
 
    color_code($parent_tables, API_MULTI_ATTRS_URL, requester_IDs_csv);
//});