>>95 こう言う意味？
var throbber = document.getElementById("navigator-throbber");
var popup = throbber.appendChild(document.createElement("menupopup"));
popup.id = "ucThrobberviewSidebarMenu";
var viewSidebarMenu = document.getElementById("viewSidebarMenu");
for (i = 0; i < viewSidebarMenu.childNodes.length; i++) {
        popup.appendChild(viewSidebarMenu.childNodes[i].cloneNode(true));
}