Reload the page. Up to 2 arguments.
- Argument 1: the text to show on the link.

- Argument 2 (optional): the position to go (anchor).

Reloading a page is interesting when it contains 
\link{def}{random variables}. In this case, to each reloading, the resulting
page is different.

\def{integer nn=random(1..1000)}
For example, in this page we have defined the variable \\nn
to be a random integer between 1 and 1000, by the command
\\def{integer nn=random(1..1000)}. Here is its current value:

\\nn=\nn.
Now 
\reload{reload the page}{reload} (\\reload{reload the page})
to see the value of \\nn change.
(The button ``reload'' of the browser will not produce this effect.)
