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Have Applets on different frames communicates with each otherTag(s): Javascript interaction


You can use a Javascript function as a bridge between the 2 frames.

[main HTML (interframe0.html)] 

<HTML><HEAD></HEAD>
<FRAMESET COLS="50%,*">
    <FRAME SRC="interframe1.html" NAME="f1" >
    <FRAME SRC="interframe2.html" NAME="f2">
</FRAMESET>
</HEAD>

[frame 1 HTML (interframe1.html)] 

<HTML><HEAD></HEAD>
<SCRIPT>
function toOtherFrame(a, target) {
 if (target == "f1")
    parent.f1.document.app1.fromOtherFrame(a);
 else
    parent.f2.document.app2.fromOtherFrame(a);
 }
</SCRIPT>
</HEAD>

<BODY>
<APPLET CODE="InterFrameDemo.class" 
        NAME="app1" MAYSCRIPT
        HEIGHT=200 
        WIDTH=200>
<PARAM  NAME="target"  
        VALUE="f2">
</APPLET></BODY></HTML>

[frame 2 HTML (interframe2.html)] 

<HTML><HEAD></HEAD>

<BODY>
<APPLET CODE="InterFrameDemo.class" 
        NAME="app2" MAYSCRIPT
        HEIGHT=200 
        WIDTH=200>
        WIDTH=200>
<PARAM  NAME="target"  
        VALUE="f1">
</APPLET></BODY></HTML>

[Java applet (InterFrameDemo.java)] 

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import netscape.javascript.*;

public class InterFrameDemo extends Applet implements ActionListener {
  TextField tf;
  Button    b;
  String    target;

  public void init() {
    target = getParameter("target");
    setLayout(new BorderLayout());
    tf = new TextField(20);
    add("South", tf);
    b  = new Button("To other frame");
    add("North",b);
    b.addActionListener(this);
  }

  public void actionPerformed(ActionEvent ae) {
    if (ae.getSource() == b) {
        String js =
          "parent.f1.toOtherFrame(\"" +
           tf.getText() +
          "\",\"" + target + "\")";
        System.out.println("to Javascript:" + js);
        JSObject win = (JSObject) JSObject.getWindow(this);
        win.eval(js);
    }
  }

  public void fromOtherFrame(String s) {
    tf.setText(s);
  }
}

Try it here

For a JAVA-only solution check this Java How-to