In text the power sign is normally given by the ^ character (above your 6 on the keyboard. E.g. 10^2 = 100.
Using a word processor the 2 would generally be turned into superscript which places it above the other characters and smaller.
In HTML you can use the <sup></sup> tag or use a CSS class.
I started working on a windows forms authentication project, which uses nhibernate, and has some management pages for managing user settings, such as resetting user password. This forms based authentication ...