How to link webpages from latex

Use the hyperref package as:

\documentclass{article}
\usepackage{hyperref}
\begin{document}

Here's a link to \href{http://webpage.com}{text}.

\end{document}

See at http://www.johndcook.com/blog/2008/11/24/link-to-web-pages-from-latex-pdf/

 or

 http://en.wikibooks.org/wiki/LaTeX/Hyperlinks