求助:查找栏findbar的两个小脚本(findbar on top和Ctrl+F Toggle findbar)失效了

/* Find bar on top */
(function () {
var findbar = document.getElementById('FindToolbar');

//move findbar to the top
var tabpanels = gBrowser.mPanelContainer;
tabpanels.parentNode.insertBefore(findbar, tabpanels);

//bottom border
findbar.setAttribute("style", "-moz-border-bottom-colors: none; border-top: 0px; border-bottom: 1px solid ThreeDShadow; max-height: 21px !important; min-height: 21px !important; margin:-4px 0px 0px 0px !important;");
})();

// Toggle findbar
function toggleFindbar() {
    if (gIeTab.goDoCommand('find')) return; 
		    if (document.getElementById('FindToolbar').hidden==true) {
        gFindBar.onFindCommand();
    }
    else
        gFindBar.close();
}
document.getElementById("cmd_find").setAttribute("oncommand",
    "toggleFindbar();");