Using an image as a document header

%\title{Using an image as a document header}
% From http://tex.stackexchange.com/questions/34040/graphics-logo-in-headers
\documentclass[11pt,a4paper]{article}

\usepackage{lipsum}
\usepackage{graphicx}

\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}
\setlength\headheight{80.0pt}
\addtolength{\textheight}{-80.0pt}
\chead{\includegraphics[width=\textwidth]{forestfloor.jpg}}

\begin{document}
\title{Title here} 
\date{September 2013}
\author{Jesper Jensen}
\maketitle

\thispagestyle{fancy}
\lipsum[1-9]
\end{document}