how to upload a file to my server using html

Basically, I have this form that allows user to upload to my server:

<form id = "uploadbanner" method = "post" action = "#">
      <input id = "fileupload" type = "file" />
      <input type = "submit" value = "submit" id = "submit" />
</form>

But the problem is that when I choose a file, then click submit, I don't see the file uploaded in the server directory.