Although I am able to call by appletviewer but not from html tag.My browser is fully java enabled.I am able to call the classes which extends Applet instead of JApplet.

Here is the applet:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

/*
*/

public class searchItem1 extends JApplet
{
JTabbedPane jtp;
public void init()
{
jtp=new JTabbedPane();
jtp.add("softwareItems",new SoftItemPanel());
getContentPane().add(jtp);
}
}
class SoftItemPanel extends JPanel implements ItemListener
{
public SoftItemPanel()
{
JComboBox jcb=new JComboBox();
jcb.addItem("systemType");
jcb.addItem("applicationType");
jcb.addItem("operatingSystem");
jcb.addItem("dataBase");
jcb.addItem("ecommerce");
jcb.addItem("middleware");
jcb.addItem("utilities");
jcb.addItem("distributedApplication");
add(jcb);
jcb.addItemListener(this);
}
public void itemStateChanged(ItemEvent ie)
{
String s=(String)ie.getItem();
System.out.println("u have selected "+s);
}
}

And I call by following html which is in the same directory :