remove_answered_questions.user.js

// ==UserScript==
// @name           Remove Answered Questions
// @namespace      tghw
// @include        http://stackoverflow.com/
// @include        http://stackoverflow.com/questions/*
// ==/UserScript==

var GM_JQ = document.createElement('script');
GM_JQ.src = 'http://jquery.com/src/jquery-latest.js';
GM_JQ.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(GM_JQ);

// Check if jQuery's loaded
function GM_wait() {
    if(typeof unsafeWindow.jQuery == 'undefined') { window.setTimeout(GM_wait,100); }
    else { $ = unsafeWindow.jQuery; inject_others(); main(); }
}
function inject_others()
{
    $('<SCRIPT>').attr({src: 'http://plugins.jquery.com/files/jquery.cookie.js.txt', type: 'text/javascript'}).appendTo('head');
}
GM_wait();

function main()
{
    var a = $('<a>');
    a.text('Hide Answered Questions');
    a.css({float: 'left', lineHeight: '36px', marginLeft: 10});
    a.attr({id: 'aHide', href: '#'});
    a.click(hide_answered)
    a.insertAfter('#subheader h2');

    if($.cookie('hide_answered') == '1')
    {
        hide_answered();
    }
}

function hide_answered()
{
    $('.answered-accepted').each(function(){$(this).parents('.question-summary').hide();});
    $.cookie('hide_answered', '1');
    $('#aHide').unbind('click', hide_answered).click(show_answered).text('Show Answered Questions');
}

function show_answered()
{
    $('.answered-accepted').each(function(){$(this).parents('.question-summary').show();});
    $.cookie('hide_answered', '0');
    $('#aHide').unbind('click', show_answered).click(hide_answered).text('Hide Answered Questions');
}