window.addEventListener('load', function() {
    var chk = document.getElementsByClassName('check'),
        len = chk.length;
    for (var i = 0; i < len; i++) {
        var c = chk[i];
        c.id = i;
        appendTag(c);
        if (c.checked) enableAutoReload(c);
        c.onclick = function(e) { enableAutoReload(null, e); };
    }
});

function appendTag(c) {
    var v = c.parentNode.getElementsByTagName('input')[1].value;
    if (v === '') return;

    var cid = 'container' + c.id,
        d = document.getElementById(cid);
    if (d === null) {
        d = document.createElement('div');
        d.id = cid;
        document.body.appendChild(d);
    }
    d.innerHTML = v;

    var f = d.firstChild,
        tgn = f.tagName;
    if (! (tgn === 'IFRAME' || tgn === 'IMG' || tgn === 'OBJECT')) {
        d.parentNode.removeChild(d);
    }
}

function enableAutoReload(c, e) {
    var t = c || e.target,
        i = t.id,
        d = document.getElementById('container' + i),
        sid = 'script' + i,
        s = document.getElementById(sid);

    appendTag(t);
    if (d === null) return;

    if (t.checked && s === null) {
        var f = d.firstChild,
            s = document.createElement('script');
        s.id = sid;
        s.src = f.src || f.data;
        document.body.appendChild(s);
    } else if (!t.checked && s !== null) {
        s.parentNode.removeChild(s);
    }
}