Images in Forms

Image maps can also be part of forms, by using the <input type=image> tag. When the image is clicked, this tag passes along to the server the x and y coordinates of that click. However, pages that use this tag rarely use it for image maps; most use it to create a graphical submit button on the form.

The TV browser has no way of interpreting if an image is a graphical submit button or an image map, and optimal behavior is different for each. For this reason there is a logic implemented within the TV browser that assigns a different behavior based upon the actual size of the image:

• Images larger than 97 × 65 pixels are assumed to be image maps and follow the rules that apply to processing those elements.
• Images smaller than 97 × 65 pixels are assumed to be graphical submit buttons; meaning the user can select only the image as a whole.

If you would like to use a button larger than the preceding dimensions to submit your form, you can do so using JavaScript.

<a href="javascript:document.formName.submit()"><img src=myImage></a>