module CGI::HtmlExtension

def img(src = "", alt = "", width = nil, height = nil)

# alt
img("SRC" => "src", "ALT" => "alt", "WIDTH" => 100, "HEIGHT" => 50)

# alt
img("src", "alt", 100, 50)

Alternatively, the attributes can be specified as a hash.

its height.
the image. +width+ is the width of the image, and +height+ is
+src+ is the URL of the image. +alt+ is the alternative text for

Generate an Image element as a string. 
def img(src = "", alt = "", width = nil, height = nil)
  attributes = if src.kind_of?(String)
                 { "SRC" => src, "ALT" => alt }
               else
                 src
               end
  attributes["WIDTH"] = width.to_s if width
  attributes["HEIGHT"] = height.to_s if height
  super(attributes)
end