Append functions

function appendHTML(HTML, to) {
    $("#" + to)[0].insertAdjacentHTML('beforeend', HTML);
}

function appendChat(text, style, classes, id) {
    var e = $("#chat-messages")[0],
        t = e.scrollTop + e.clientHeight === e.scrollHeight;
    appendHTML("<div "
        + (classes === undefined ? "" : "class=\"" + classes + "\" ")
        + (style === undefined ? "" : "style=\"" + style + "\" ")
        + (id === undefined ? "" : "id=\"" + id + "\"")
        + ">" + text + "</div>", "chat-messages");
    if (t) {
        e.scrollTop = e.scrollHeight;
    }
}