module CGI::HtmlExtension

#
image_button("SRC" => "url", "ALT" => "string")

#
image_button("url", "name", "string")

#
image_button("url")

Alternatively, the attributes can be specified as a hash.

is the input name. +alt+ is the alternative text for the image.
+src+ is the URL of the image to use for the button. +name+

Generate an Image Button Input element as a string.

def image_button(src = "", name = nil, alt = nil)
  attributes = if src.kind_of?(String)
                 { "TYPE" => "image", "SRC" => src, "NAME" => name,
                   "ALT" => alt }
               else
                 src["TYPE"] = "image"
                 src["SRC"] ||= ""
                 src
               end
  input(attributes)
end