User:Gary/subjects age from year

In an article about a person or a company, when the mouse hovers over a year in the article, the age of the article's subject by that year appears in a tooltip.

Installation
After installing the script, bypass the cache of the page. (This will generate text which can be used on any-language Wikipedia.) This can only be used on the English Wikipedia.)
 * Method 1:
 * 1) Press Publish changes (ignore any error warnings).
 * Method 2:
 * 1) Place  on the bottom of your common.js page or your skin.js page.
 * 2) Press Publish changes (ignore any error warnings).
 * Method 3:
 * 1) Click here, then click the install link at the top. (Don't use this if you have Enterprisey's script installer enabled).