Clown Computing

function handleText(textNode)
{
    textNode.nodeValue = textNode.nodeValue

    .replace(/Cloud/g, "Clown")
    .replace(/cloud/g, "clown")
    .replace(/CLOUD/g, "CLOWN")

    ;
}

function walk(node)
{
    // thanks to: http://is.gd/mwZp7E
    switch (node.nodeType) {
        case  1: // Node.ELEMENT_NODE
        case  9: // Node.DOCUMENT_NODE
        case 11: // Node.DOCUMENT_FRAGMENT_NODE
            var child = node.firstChild;
            while (child) {
                var next = child.nextSibling;
                walk(child);
                child = next;
            }
            break;

        case  3: // Node.TEXT_NODE
            handleText(node);
            break;
    }
}

walk(document.body);