<S> | NN 3 IE 3 HTML 3.2
<S>...</S> | End Tag: Required
The S element renders its content as strikethrough text. This element is identical to the STRIKE element; it was adopted because it more closely resembled the one-character element names for other type formatting (such as B, I, and U elements). In any case, both S and STRIKE elements are deprecated in HTML 4.0 in favor of the text-decoration:line-through style sheet attribute.
Example
    <P>If at first you don't succeed, <S>do it over</S> try, try again.</P>
Object Model Reference
IE | [window.]document.all.elementID