READER INSERT CODE (THEME)

<script type="text/javascript">
document.getElementById("submit").addEventListener('click', function(){
  walk(document.body, /\by\/n\b|\(y\/n\)/ig, document.getElementById("inputTxt").value);
});

function walk(node, v, p){
    var child, next;
    switch (node.nodeType){
        case 1:  // Element
        case 9:  // Document
        case 11: // Document fragment
            child = node.firstChild;
            while (child){
                next = child.nextSibling;
                walk(child, v, p);
                child = next;
            }
            break;
        case 3: // Text node
            handleText(node, v, p);
            break;
    }
}

function handleText(textNode, val, p){
    var v = textNode.nodeValue;
    v = v.replace(val, p);
    textNode.nodeValue = v;
}
</script>