JS compatible Firefox IE Favorites Set homepage code

Add to Favorites
function Addcookie (URL, title) {
if (document.all) {
Window.external.addFavorite (URL, title);
}
else if (Window.sidebar) {
Window.sidebar.addPanel (title, URL, "");
}
}
Set as homepage
function setHomePage (URL) {
if (document.all) {
Document.body.style.behavior= ' url (#default #homepage) ';
Document.body.setHomePage (URL);
}
else if (Window.sidebar) {
if (Window.netscape) {
try{
Netscape.security.PrivilegeManager.enablePrivilege ("Universalxpconnect");
}
catch (e) {
Alert ("Your browser does not enable [set as homepage] feature, open method: First enter About:config in the Address bar, then the item Signed.applets.codebase_principal_support value should be true");
}
}
var prefs=components.classes[' @mozilla. Org/preferences-service;1 '].getservice ( Components.interfaces.nsIPrefBranch);
Prefs.setcharpref (' browser.startup.homepage ', url);
}
}