An <INPUT> element with `TYPE=IMAGE' specifies an image resource to display, and allows input of two form fields: the x and y coordinate of a pixel chosen from the image. The names of the fields are the name of the field with `.x' and `.y' appended. `TYPE=IMAGE' implies `TYPE=SUBMIT' processing; that is, when a pixel is chosen, the form as a whole is submitted.
The NAME attribute is required as for other input fields. The SRC attribute is required and the ALIGN is optional as for the <IMG> element (see 5.10, "Image: IMG").
<p>Choose a point on the map: <input type=image name=point src="map.gif">