+import java.awt.BorderLayout;
+import java.awt.Canvas;
+import java.awt.CheckboxMenuItem;
+import java.awt.Color;
+import java.awt.FlowLayout;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Label;
+import java.awt.Menu;
+import java.awt.MenuBar;
+import java.awt.MenuItem;
+import java.awt.Panel;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.FocusEvent;
+import java.awt.event.FocusListener;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.io.IOException;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.util.Arrays;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.StringTokenizer;
+import java.util.Vector;
+
+import org.jmol.viewer.Viewer;
+