procedure Tfrmsplash.ApplicationEvents1Message(var Msg: tagMSG;
var Handled: Boolean);
begin
if (Msg.message = WM_RBUTTONDOWN) and (msg.hwnd =WebBrowser1.handle) then
begin
popupmenu1.Popup(Mouse.CursorPos.X, Mouse.CursorPos.Y);//这里自定义
Handled := True;
end;