force image to download

Hi,

I am creating an intranet page for my company where they can download images of the company logo and partners’ logos.  Is there a way to force a save dialog box to open up instead of the image opening up in a browser.  My page is in html format so no server-side scripting is use. 

When I search the web all I get are examples in PHP and get the following:

header("Content-Type: application/force-download");  

I experiment this in a META tag:

  <META http-equiv="Content-Type" content="application/force-download">

 but it didn't help.  Does anyone know of a solution?

Thanks in advance,

RCorr

you could rename it with an un-recognized extension and inform the users to rename it after downloading...

Thanks for all of your suggestions.  I prefer not to change the extension.  I visited the page that MortiOli suggested and read that the script only puts the image into cache and instead of prompting a dialog box as it mentioned on the web site. 

I read the page comments and found that I need to implement the mime header application/octet-stream to be able to force the image to download.  How do I go about adding this to my web page?

Thanks in advance,

RCorr