wonderfl.js

(function () {
    var id = (function () {
        var i, l, q, div, el, qs;
        el = document.getElementsByTagName('SCRIPT');
        el = el[el.length-1];
        qs = el.src.split('?').pop().split('&');
        l = qs.length;
        for (i=0; i<l; i++) {
            q = qs[i].split('=');
            if (q[0]=='id') {
                div = document.createElement('DIV');
                div.setAttribute('id', q[1]);
                el.parentNode.appendChild(div);
                return q[1];
            }
        }
    })();

    var url = [
        'http://swf.wonderfl.net/swf/usercode',
        id.substr(0, 1),
        id.substr(0, 2),
        id.substr(0, 4),
        id + '.swf',
    ].join('/');

    swfobject.embedSWF(url, id, '640', '480', '10');
})();