HTML superscript text <input type = "submit" / ">
You can use the <button type="submit"> element instead of the <input type="submit"> Then you can include any markup in the description, for example, <sup> for superscript text:
<button type="submit">someText with <sup>superscripted parts</sup> </button> If you should use <input type=submit> rather than <button type=submit> , you're out of luck. The text should be specified in the value attribute, which is taken as plain text. You can use superscript characters such as "²", but there is a superscript version of "®" as a character, but its appearance varies greatly in all fonts, being much more superscript in some fonts than, for example, in Arial.
Thus, a practical step may be to specify a different font for the button. For consistency, you probably want to use the same font for all the text of the submit buttons, for example.
input[type=submit] { font-family: Calibri; } Usual CSS warnings are used. In particular, in this context it can be difficult to specify a good list of font families. (Caliber is wonderful, but its availability is far from universal.)