code: public java.lang.String getImage() {
          return (java.lang.String) getStateHelper().eval(PropertyKeys.image);
  
      }
docs: <p>Return the value of the <code>image</code> property.</p>
  <p>Contents: <p>
  Absolute or relative URL of the
  image to be displayed for this
  button.  If specified, this
  "input" element will be of type
  "image".  Otherwise, it will be
  of the type specified by the
  "type" property with a label
  specified by the "value"
  property.  <span
  class="changed_added_2_0">Note
  that if the value of this
  attribute starts with "/", the
  rendered value for this
  attribute will be prefixed with
  the context-root for this
  application.</span>
  </p>