<SUP> Tag & its Attribute
HTML Tag <SUP>
<SUP> Indicates superscript text.
Attribute of <SUP> Tag
CLASS
Indicates which style class applies to the <SUP> element.
H<SUP CLASS="dkm">2</SUP>O
Possible Values
Any Class Name.
ID
Assigns a unique ID selector to an instance of the <PRE> tag. When you then assign a style to that ID selector, it affects only that one instance of the <SUP> tag.
H<SUP>2</SUP>O
Possible Values
Any ID Name.
STYLE
Specifies Style Sheet commands that apply to the contents within the <SUP> tags.
H<SUP STYLE="background: red">2</sub>O
Possible Values
CSS Property with value.
TITLE
Specifies text assigned to the tag. You might use this attribute for context-sensitive help within the document. Browsers may use this to show tool tips over the superscripted text.
H<SUP TITLE="water">2</SUP>O
Possible Values
Any text Message.