<SUP> | NN 2 IE 3 HTML 3.2
<SUP>...</SUP> | End Tag: Required
The SUP element is a typographical element that instructs the browser to render its content as a superscript in a font size consistent with the surrounding content. Browsers tend to render this content in a smaller size than surrounding content.
Example
    <P>This book is published by O'Reilly<SUP>&#153;</SUP>.</P>
Object Model Reference
IE | [window.]document.all.elementID