// ==UserScript==
// @name           tweetReducer
// @namespace      http://jamadam.com/
// @description    Avoid Twitter Timeline size get too long
// @include        http://twitter.com/*
// ==/UserScript==

(function() {

    var $;
    var jversion = '1.2.6';
    var jexist = (typeof unsafeWindow.jQuery != 'undefined');
    var conflict = (jexist && unsafeWindow.jQuery.fn.jquery != jversion);
    // Add jQuery if not loaded
    if (! jexist || conflict) {
        var GM_JQ = document.createElement('script');
        GM_JQ.src = 'http://ajax.googleapis.com/ajax/libs/jquery/' + jversion + '/jquery.js';
        GM_JQ.type = 'text/javascript';
        document.getElementsByTagName('body')[0].appendChild(GM_JQ);
    }

    GM_wait();

    // Check if jQuery's loaded
    function GM_wait() {
        if (typeof unsafeWindow.jQuery == 'undefined' || unsafeWindow.jQuery.fn.jquery != jversion) {
            window.setTimeout(GM_wait,100);
        } else {
            if (conflict) {
                $ = unsafeWindow.jQuery.noConflict(true);
            } else {
                $ = unsafeWindow.jQuery;
            }
            letsJQuery();
        }
    }

    // All your GM code must be inside this function
    function letsJQuery() {
        var topid = $('#timeline li').eq(0).attr('id');
        window.setInterval(reduce, 5000);
        function reduce() {
            var newid = $('#timeline li').eq(0).attr('id');
            if (topid != newid) {
                topid = newid;
                while ($('#timeline li').length > 60) {
                    $('#timeline li').eq(60).remove();
                }
            }
        }
    }
})();