\usepackage{url}) you can enter URLs like
this: \url{http://www.stack.nl/~jwk/latex/}. It will result in :
\usepackage{hyperref}) you can
make these urls clickable in a pdf-file (which you can create with pdflatex).
You can also make links which show a description of the text and not the
url (\href{URL}{text}). Unfortunately this does not work together with
LaTeX2HTML.
More information on the hyperref package can be found in the file
``/usr/local/share/texmf-dist/doc/latex/hyperref/manual.pdf''.
This also works in dvifiles. Note that it necessary to use
\usepackage[hypertex]{hyperref} for newer teTeX versions or otherwise
local links won't work in dvi files. Note that hyperref messes up
documents that also use the a4wide package. The solution to this is to
also put a4paper before the documentclass with
``\documentclass[a4paper]{article}'' or before hyperref with
``\usepackage[a4paper=true]{hyperref}''. It is possible to combine
options with commas as in
``\usepackage[a4paper=true,hypertex]{hyperref}''.
See also the TeX FAQ on ``Typesetting URLs''
(http://www.tex.ac.uk/cgi-bin/texfaq2html?label=setURL) or ``Link text
doesn't break at end line''
(http://www.tex.ac.uk/cgi-bin/texfaq2html?label=breaklinks).