class WWW::Mechanize::Form::ImageButton

to set the x and y positions for where the mouse “clicked”.
This class represents an image button in a form. Use the x and y methods

def initialize(name, value) 

def initialize(name, value)
  @x = nil
  @y = nil
  super(name, value)
end

def query_value 

def query_value
    super <<
     [@name + ".x", (@x || 0).to_s] <<
     [@name + ".y", (@y || 0).to_s]
end