Apache正在侦听不同的端口，但是如何获取它所以我不必输入端口号？

I am running IIS and Apache HTTP Server side-by-side on my localhost machine, and Apache is listening on a different port (port 81). IIS is listening to port 80. However, I can only get to my virtual domains for Apache if I type in that port number. So for instance:I am running IIS and Apache HTTP Server side-by