javascript：HTMLEncode和htmlDecode

function HTMLEncode(html) {
        var temp = document.createElement("div");
        (temp.textContent != null) ? (temp.textContent = html) : (temp.innerText = html);
        var output = temp.innerHTML;
        temp = null;
        return output;
    }
    function htmlDecode(text){
        var temp = document.createElement("div");
        temp.innerHTML = text;
        var output = temp.innerText || temp.textContent;
        temp = null;
        return output;
    }