Adding Multiple Images to a formit form

Does anyone know what the best way of allowing the user to add up to 5 images to a formit form? Ideally i'd like to have the ability for a user to add one image, then when an image is selected (using File input type), another field appears allowing them to attach another image. Is this possible? I am using Revo. Many thanks

I think that could only be done with JavaScript. Here are some examples:

http://forum.codecall.net/topic/40444-javascript-to-add-a-text-input-field/

http://www.mkyong.com/jquery/how-to-add-remove-textbox-dynamically-with-jquery/

http://www.randomsnippets.com/2008/02/21/how-to-dynamically-add-form-elements-via-javascript/

Thanks BobRay