\documentclass[11pt,a4paper,english]{article}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{babel}
\usepackage{graphicx}
%\usepackage{amsfonts}

\title{Test}
\author{}
%\date{}

\begin{document}
\maketitle{}


Cross directory automatic dependencies:\\
\verb@\includegraphics{}@:\\
\includegraphics{../dir2/fig1.fig.eps} \\
\verb@\input{}@: \\
\input{../dir2/include1}


\end{document}