Trying to Make a Previous Button

    This should be a simple fix. I'm trying to create a button that when clicked will send the viewer back 20 frames in the timeline. I had some help with this but when I got home and tried this out I get the error message 1137.
photography_mc.goPrev.addEventListener(MouseEvent.CLICK,goPrevImage);
    function goPrevImage(event:MouseEvent):void {
        var cf = photography_mc.currentFrame;
        cf -= 20
        if( cf > 0 ){
            photography_mc.play( cf );
    I'm not sure what to do from here. It says the error occurs at the line "photography_mc.play( cf );"
   Please help me out, thanks y'all!

play() is not the command to use... it doesn't accept arguments. You need to use gotoAndPlay(cf)

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Next and Previous Button Question

First my code :)
import java.util.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.GridLayout;
import java.lang.Object;
import java.awt.Image;
public class Inventory // Main class
//main method begins execution of java application
public static void main(String args[])
     int i;
     double totalInventory = 0.0;
     final int dispProd = 0; // variable for actionEvents
     final part[] myPart = new part[4];
     for (i=0; i<4; i++)
               myPart[0] = new part("Glass Break", 730, 12, 32.19);
              myPart[1] = new part("Motion", 995, 14, 37.69);
              myPart[2] = new part("Keypad", 220, 12, 50.69);
              myPart[3] = new part("Contact", 944, 44, 1.19);
     final JButton firstBtn = new JButton("First");
     final JButton prevBtn = new JButton("Previous");
     final JButton nextBtn = new JButton("Next");
     final JButton lastBtn = new JButton("Last");
     final JLabel label;
     final JTextArea textArea;
     final JPanel buttonJPanel;
     //Add Logo
     ImageIcon icon = new ImageIcon("javashield.JPG");
               label = new JLabel("Some Company Inc.", icon, JLabel.RIGHT);
     //Set the position of the text, relative to the icon:
     label.setVerticalTextPosition(JLabel.BOTTOM);
     label.setHorizontalTextPosition(JLabel.CENTER);
     buttonJPanel = new JPanel(); // set up panel
     buttonJPanel.setLayout( new GridLayout(1, 4)); //set layout
          // add buttons to buttonPanel
     buttonJPanel.add(firstBtn);
     buttonJPanel.add(prevBtn);
     buttonJPanel.add(nextBtn);
     buttonJPanel.add(lastBtn);
textArea = new JTextArea(myPart[3]+" "); // create textArea for product display
     // add total inventory value to GUI
textArea.append("\nTotal value of Inventory "+new java.text.DecimalFormat("$0.00").format(totalInventory)+"\n\n");
textArea.setEditable(false);
JFrame invFrame = new JFrame();
invFrame.setLayout(new BorderLayout());
invFrame.getContentPane().add(new JScrollPane(textArea), BorderLayout.CENTER);
invFrame.getContentPane().add(buttonJPanel, BorderLayout.SOUTH);
invFrame.getContentPane().add(label, BorderLayout.NORTH);
invFrame.setTitle("INVENTORY:");
invFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
invFrame.setSize(350, 350);
invFrame.setLocationRelativeTo(null);
invFrame.setVisible(true);
// assign actionListener and actionEvent for each button
firstBtn.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae)
textArea.setText(myPart[0]+"\n");
}); // end firstBtn
prevBtn.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae)
textArea.setText(myPart[1]+"\n");
}); // end prevBtn
nextBtn.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae)
textArea.setText(myPart[2]+"\n");
}); // end nextBtn
lastBtn.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae)
textArea.setText(myPart[3]+"\n");
}); // end lastBtn
} // end main
} // end class Inventory6
class part
   public String partName;
   public int itemNum;
   public double units;
   public double price;
   //default constructor
public part()
        partName = "";
        itemNum = 0;
        units = 0.0;
         price = 0.00;
    }//end default constructor
     //Parameterized Constructor
public part( String partName, int itemNum, double units, double price)
        this.partName = partName;
         this.itemNum = itemNum;
         this.units = units;
         this.price = price;
    }//end constructor
     public void setpartName(String partName) {
         this.partName = partName;
        public String getpartName()
          return partName;
    public void setitemNum ( int itemNum )
       this.itemNum = itemNum;
    public int getitemNum()
     return itemNum;
    public void setunits ( double units )
         this.units = units;
     public double getunits()
          return units;
     public void setprice ( double price )
         this.price = price;
     public double getprice()
     return price;
//calculates product total
     public double invTotal()
     return (units * price);
public String toString()
          return "Part: "+partName+
                    "\nPart Number: "+itemNum+
                    "\nUnits on hand: "+(int)units+
                    "\nPrice per unit: $"+price+
                    "\nPart Total: $"+invTotal();
//end Class Part
// Class Part holds Part information
class Wireless extends part
private String wlPart; // variable for added feature
public Wireless(String partName, int itemNum, double units, double price, String addWL)
// call to superclass constructor
super(partName, itemNum, units, price);
wlPart = addWL;
}// end constructor
public void setwlPart(String addWL) // method to set added feature
wlPart = addWL;
public String getwlPart() // method to get added feature
return wlPart;
public double totalRestock() // method to set value and add restock fee
return units * price * 0.05;
public String toString()
return "Part: "+partName+
                    "\nPart Number: "+itemNum+
                    "\nUnits on hand: "+(int)units+
                    "\nPrice per unit: $"+price+
                    "\nRestock Fee: $"+totalRestock()+
                    "\nPart Total: $"+invTotal();
} I need to make my next and previous button keep going through the array. They go next or previous one time and stop. I know it is because of the way I wrote the statement
textArea.setText(myPart[2]+"\n");What I can't figure out is how to make that statement be the current myPart and add 1 to it. I tried textArea.setText(myPart[i]+1+"\n");and it did not work either, I got these errors:
C:\Inventory\Inventory.java:92: local variable i is accessed from within inner class; needs to be declared final
textArea.setText(myPart[i]+1+"\n");
^
C:\Inventory\Inventory.java:92: operator + cannot be applied to part,int
textArea.setText(myPart[i]+1+"\n");
^
2 errors
So I tried to write {nextItem()}
and writing a method for next item,
nextBtn.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae)
nextItem();
}); // end nextBtn
lastBtn.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae)
textArea.setText(myPart[3]+"n");
} // end lastBtn actionEvent
}); // end lastBtn actionListener
} // end main
private static void nextItem();
if (myPart < myPart[]-1)
     myPart++;
     textArea.setText(myPart[0]);
}and I get this error
C:\Inventory\Inventory.java:109: '.class' expected
if (myPart < myPart[]-1){
^
1 error
I thought '.class' expected meant I was missing a bracket, but I can't see where I am missing a bracket.
I feel dumber by the minute.
Am I not seeing something?

Another suggestion. First create a non-GUI Inventory class, something like this:
public class Inventory
    private part[] myPart;
    private int index = 0;
    public Inventory()
        myPart = new part[4];
        myPart[0] = new part("Glass Break", 730, 12, 32.19);
        myPart[1] = new part("Motion", 995, 14, 37.69);
        myPart[2] = new part("Keypad", 220, 12, 50.69);
        myPart[3] = new part("Contact", 944, 44, 1.19);
    public part getPart(int i)
        //TODO fill this in
    public part getFirst()
        //TODO fill this in
    public part getLast()
        //TODO fill this in
    public part getNext()
        //TODO fill this in
    public part getPrev()
        //TODO fill this in
    public double getTotalInventory()
        //TODO fill this in
    // this main is here only to test out the class
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        Inventory inv = new Inventory();
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            System.out.println();
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}Then use this class as a variable within another class, say InventoryGUI. In this second class, the "next" button would call the Inventory object's getNext() method.

Creating next/previous buttons problem

I am creating next & previous buttons on my main scene. I have created a scrolling photo gallery as well as a random button to randomly select images. I have a photos layer that has 15 images tagged in the AS "img1" "img2"....hopefully this all makes sense so far.
What script can I use to easily create a next_btn. This is what I currently have
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"img"+1 goes to the "img1" however I would like it to go to the next img instead of always go to img1. I've tried _currentframe+10 (images are 10 frames apart) and some others but cannot seem to get it to work.
I would like this to work along with the random button so that when a random image is clicked, the person can click the next button and get to the next image.
Current script in...
random_btn.onRelease = function(){
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next_btn.onRelease = function() {
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if you need any clarification let me know! thanks!

i'll try to explain this simplier.
scene 1 (layers)
inside layers
AS
next back btn
random btn
photos
displays images when clicked on from photo gallery
scrolling photo gallery
photo gallery + buttons for gallery
i'm looking to create a simple < > prev and next image buttons.
My current script from above (original post) hasn't worked out.
random_btn.onRelease = function(){
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    picNum = Math.ceil(Math.random()*15);
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next_btn.onRelease = function() {
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    photos.fader.gotoAndPlay(2);
I'll take out the random_btn if need be to create just a regular next button and previous button. (i'll worry about tracking the scrolling image gallery later...one issue at a time)
Thanks again.

Trying to Make a Previous Button

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