function enlarge(dir, filename, description, fullscreen) {
	var doc= "../../grafics/extras/"
		+ dir
		+ "/"
		+ filename;
	if ( fullscreen == null ) {
		document.write( "<link rel='stylesheet' type='text/css' media='screen' href='../../stylesheets/tableSheetExtra.css'>"
			+ "<table align='center'>"
			+ 	"<tr><td>"
			+ 		"<img border='3' src='"
			+			doc
			+ 		"'>"
			+ 	"</td></tr>"
			+ 	"<tr><td>"
			+		"<font size='2'>"
			+ 			description
			+		"</font>"
			+ 	"</td></tr>"
			+	"<tr><td>"
			+		"<font size='2'>"
			+			"<a href='javascript:window.history.back()'>"
			+				"Vorige"
			+			"</a>"
			+		"</font>"
			+	"</td></tr>"
			+ "</table>"
			)
	} else {
		largerWindow= window.open(doc, "" , "scrollbars=yes,toolbar=no,status=no,location=no,dependend=yes,menubar=no");
	}
}