HTTP Error 405 from a Tooltip loading another page

I have a web page that uses tooltips. I am using Pr开发者_如何学编程ototip specifically. One of the options is to use Ajax to load another page within the tool. The Ajax functionality is coming from the Prototype framework, http://www.prototypejs.org/api/ajax/request/.

All I really want to load is an image. I just don't want the image to load on page creation because there are so many images. So when I put a link to a .jpg file or even a .html file I receive the error HTTP Error 405.0 - Method Not Allowed from IIS. I am running IIS7. Is this an issue with my code or an issue with IIS7? Also, the other version of the error I am getting is The HTTP verb POST used to access path '/Images/Items/tech_over_RST.jpg' is not allowed. I receive this version of the error message when I run in debug mode from VS2010. I am also using URL Routing but not MVC.

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I'd like to see the code you're using. However, "405.0 Method Not Allowed" error when you POST some information to an image file makes perfect sense: you can post data to scripts such as ASP, ASPX, PHP or CGI scripts but not to images/documents such as JPG, GIF, HTML etc. And you should not specify an image file as the URL for an AJAX GET/POST request in the first place.