Opening a Folder through website

Hi all,
I am maintaining an ASP website and the users want to be able to click on a link that open up a folder where they could select which file they want from within that folder.
 
I tried to making a link with the tag <a href=[folderpath]>Text</a> but I can a 403 HTTP error saying that the website requires a login for this action. Is there some way that I could send the person's credentials along with the request so the folder can be opened?
 
Thanks,
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