source: trunk/www.guidonia.net/wp/wp-admin/js/xfn.dev.js@ 44

function GetElementsWithClassName(elementName, className) {
        var allElements = document.getElementsByTagName(elementName), elemColl = new Array(), i;
        for (i = 0; i < allElements.length; i++) {
                if (allElements[i].className == className) {
                        elemColl[elemColl.length] = allElements[i];
                }
        }
        return elemColl;
}

function meChecked() {
        var undefined, eMe = document.getElementById('me');
        if (eMe == undefined) return false;
        else return eMe.checked;
}

function upit() {
        var isMe = meChecked(), inputColl = GetElementsWithClassName('input', 'valinp'), results = document.getElementById('link_rel'), inputs = '', i;
        for (i = 0; i < inputColl.length; i++) {
                 inputColl[i].disabled = isMe;
                 inputColl[i].parentNode.className = isMe ? 'disabled' : '';
                 if (!isMe && inputColl[i].checked && inputColl[i].value != '') {
                        inputs += inputColl[i].value + ' ';
                                }
                 }
        inputs = inputs.substr(0,inputs.length - 1);
        if (isMe) inputs='me';
        results.value = inputs;
        }

function blurry() {
        if (!document.getElementById) return;

        var aInputs = document.getElementsByTagName('input'), i;

        for ( i = 0; i < aInputs.length; i++) {
                 aInputs[i].onclick = aInputs[i].onkeyup = upit;
        }
}

addLoadEvent(blurry);