Help please, I try to sending an email from my html page using the java
applet.
but it give error on most of the PC only very few work, what is the error i
make
the java applet show as below

**********************************

package Celcom.Client;

import java.applet.*;
import java.awt.*;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
/**
* Insert the type's description here.
* Creation date: (11/3/2003 5:19:42 PM)
* @author: Administrator
*/
public class SimpleEMail extends Applet {
//User define veriable
private String strSMTPHost = "";
private String strRecipients = "";
private String strFrom = "";
private String strSubject = "";
private String strMessage = "";
/**
* Cleans up whatever resources are being held. If the applet is active
* it is stopped.
*
* @see #init
* @see #start
* @see #stop
*/
public void destroy() {
super.destroy();

// insert code to release resources here
}
/**
* Insert the method's description here.
* Creation date: (11/4/2003 9:44:56 AM)
* @param newMsgLine java.lang.String
*/
protected void displayMsg(String newMsgLine) {
//String strMsg = gettxtMsg().getText();
//strMsg += "\n" + newMsgLine;
//gettxtMsg().setText(strMsg);
}
/**
* Insert the method's description here.
* Creation date: (11/4/2003 9:44:04 AM)
*/
protected void emptyMsg() {
//gettxtMsg().setText("");
}
/**
* Returns information about this applet.
* @return a string of information about this applet
*/
public String getAppletInfo() {
return "SimpleEMail\n" +
"\n" +
"Insert the type's description here.\n" +
"Creation date: (11/3/2003 5:18:15 PM)\n" +
"@author: James Hong\n" +
"";
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @return java.lang.String
*/
public java.lang.String getFrom() {
return strFrom;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @return java.lang.String
*/
public java.lang.String getMessage() {
return strMessage;
}
/**
* Returns parameters defined by this applet.
* @return an array of descriptions of the receiver's parameters
*/
public java.lang.String[][] getParameterInfo() {
String[][] info = {
{"smtphost", "String", ""},
{"recipients","String",""},
{"from", "String", ""},
{"subject","String",""},
{"message", "String", ""}
};
return info;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @return java.lang.String
*/
public java.lang.String getRecipients() {
return strRecipients;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:46:49 PM)
* @return java.lang.String
*/
public java.lang.String getSMTPHost() {
return strSMTPHost;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @return java.lang.String
*/
public java.lang.String getSubject() {
return strSubject;
}
/**
* Called whenever the part throws an exception.
* @param exception java.lang.Throwable
*/
private void handleException(java.lang.Throwable exception) {

/* Uncomment the following lines to print uncaught exceptions to stdout */
// System.out.println("--------- UNCAUGHT EXCEPTION ---------");
// exception.printStackTrace(System.out);
}
/**
* Initializes the applet.
*
* @see #start
* @see #stop
* @see #destroy
*/
public void init() {
try {
super.init();
setName("SimpleEMail");
setLayout(new java.awt.BorderLayout());
setSize(209, 21);
setVisible(false);
// user code begin {1}
// strSMTPHost = this.getParameter("smtphost");
// strRecipients = this.getParameter("recipients");
// strFrom = this.getParameter("from");
// strSubject = this.getParameter("subject");
// strMessage = this.getParameter("message");
// user code end
} catch (java.lang.Throwable ivjExc) {
// user code begin {2}
// user code end
handleException(ivjExc);
}
}
/**
* main entrypoint - starts the part when it is run as an application
* @param args java.lang.String[]
*/
public static void main(java.lang.String[] args) {
try {
Frame frame = new java.awt.Frame();
SimpleEMail aSimpleEMail;
Class iiCls = Class.forName("Celcom.Client.SimpleEMail");
ClassLoader iiClsLoader = iiCls.getClassLoader();
aSimpleEMail =
(SimpleEMail)java.beans.Beans.instantiate(iiClsLoa der,"Celcom.Client.SimpleE
Mail");
frame.add("Center", aSimpleEMail);
frame.setSize(aSimpleEMail.getSize());
frame.addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent e) {
System.exit(0);
};
});
frame.show();
java.awt.Insets insets = frame.getInsets();
frame.setSize(frame.getWidth() + insets.left + insets.right,
frame.getHeight() + insets.top + insets.bottom);
frame.setVisible(true);
} catch (Throwable exception) {
System.err.println("Exception occurred in main() of java.applet.Applet");
exception.printStackTrace(System.out);
}
}
/**
* Paints the applet.
* If the applet does not need to be painted (e.g. if it is only a container
for other
* awt components) then this method can be safely removed.
*
* @param g the specified Graphics window
* @see #update
*/
public void paint(Graphics g) {
super.paint(g);

// insert code to paint the applet here
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:52:32 AM)
*/
protected void postMail(String smtphost, String recipients[], String
subject, String message , String from) throws MessagingException
{
boolean debug = false;

//Set the host smtp address
Properties props = new Properties();
//props.put("mail.smtp.host", "smtp.jcom.net");
props.put("mail.smtp.host", smtphost);

// create some properties and get the default Session
Session session = Session.getDefaultInstance(props, null);
session.setDebug(debug);

// create a message
Message msg = new MimeMessage(session);

// set the from and to address
InternetAddress addressFrom = new InternetAddress(from);
msg.setFrom(addressFrom);

InternetAddress[] addressTo = new InternetAddress[recipients.length];
for (int i = 0; i < recipients.length; i++)
{
addressTo[i] = new InternetAddress(recipients[i]);
}
msg.setRecipients(Message.RecipientType.TO, addressTo);


// Optional : You can also set your custom headers in the Email if you
Want
// msg.addHeader("MyHeaderName", "myHeaderValue");

// Setting the Subject and Content Type
msg.setSubject(subject);
msg.setContent(message, "text/html");
Transport.send(msg);
}
/**
* Comment
*/
public String sendEMail() {
java.util.StringTokenizer stkRecipientsList = null;
String recipients[] = null;
int nCnt = 0;

emptyMsg();
// verify smtp host
displayMsg("SMTP host : " + getSMTPHost());
if (getSMTPHost().trim().equalsIgnoreCase("")){
return "Blank SMTP host.";
}

// verify From EMail
displayMsg("From Email : " + getFrom());
if (getSMTPHost().trim().equalsIgnoreCase("")){
return "Blank from email address.";
}

// verify Recipients EMail
displayMsg("Recipients Email : " + getRecipients());
stkRecipientsList = new java.util.StringTokenizer(getRecipients(), ";");
if (stkRecipientsList.countTokens() == 0){
return "No recipients email found.";
}

// verify Subject
displayMsg("Subject : " + getSubject());

// verify Message
displayMsg("Message body : \n" + getMessage());


recipients = new String[stkRecipientsList.countTokens()];
while(stkRecipientsList.hasMoreTokens()) {
recipients[nCnt] = stkRecipientsList.nextToken();
nCnt += 1;
}

try {
postMail(getSMTPHost(), recipients, getSubject(), getMessage(),
getFrom());
} catch (MessagingException exc) {
return exc.getMessage();
}

return "";
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @param newFrom java.lang.String
*/
public void setFrom(java.lang.String newFrom) {
strFrom = newFrom;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @param newMessage java.lang.String
*/
public void setMessage(java.lang.String newMessage) {
strMessage = newMessage;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @param newRecipients java.lang.String
*/
public void setRecipients(java.lang.String newRecipients) {
strRecipients = newRecipients;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:46:49 PM)
* @param newSMTPHost java.lang.String
*/
public void setSMTPHost(java.lang.String newSMTPHost) {
strSMTPHost = newSMTPHost;
}
/**
* Insert the method's description here.
* Creation date: (11/3/2003 5:51:20 PM)
* @param newSubject java.lang.String
*/
public void setSubject(java.lang.String newSubject) {
strSubject = newSubject;
}
/**
* Called to start the applet. You never need to call this method
* directly, it is called when the applet's document is visited.
* @see #init
* @see #stop
* @see #destroy
*/
public void start() {
super.start();

// insert any code to be run when the applet starts here
}
/**
* Called to stop the applet. It is called when the applet's document is
* no longer on the screen. It is guaranteed to be called before destroy()
* is called. You never need to call this method directly.
* @see #init
* @see #start
* @see #destroy
*/
public void stop() {
super.stop();

// insert any code to be run when the applet is stopped here
}
}


********************************
and the html page as below
********************************

<HTML>
<HEAD>
<TITLE>SimpleEMail</TITLE>
<script language="JavaScript">
function sendingEMail(){
window.SimpleEMail.setSMTPHost(window.smtphost.val ue);
window.SimpleEMail.setFrom(window.fromemail.value) ;
window.SimpleEMail.setRecipients(window.toemail.va lue);
window.SimpleEMail.setSubject(window.subject.value );
window.SimpleEMail.setMessage(window.message.inner Text);
window.SimpleEMail.sendEMail();
alert("done");
}
</script>
</HEAD>
<BODY>
<H1>SimpleEMail</H1>
<P>
<APPLET style="LEFT: 0px; WIDTH: 144px; TOP: 0px; HEIGHT: 14px" height=14
archive=CelcomClient.jar width=144 code=Celcom.Client.SimpleEMail.class
name=SimpleEMail>
<PARAM NAME="from" VALUE="test@mail.com">
<PARAM NAME="smtphost" VALUE="mango">
<PARAM NAME="recipients" VALUE="test@mail.com;">
<PARAM NAME="subject" VALUE="Testing">
<PARAM NAME="message" VALUE="Hello">
</APPLET>
</P>
<P>
<TABLE>
<tr>
<td>Smtp Host</td><td align=middle> : </td>
<td><INPUT style="WIDTH: 255px; HEIGHT: 22px" size=32 id=smtphost
name=smtphost value=smtp.mail.com></td>
<tr>
<tr>
<td>From Email</td><td align=middle> : </td>
<td><INPUT style="WIDTH: 255px; HEIGHT: 22px" size=32 id=fromemail
name=fromemail value=test@mail.com></td>
<tr>
<tr>
<td>To Email</td><td align=middle> : </td>
<td><INPUT style="WIDTH: 255px; HEIGHT: 22px" size=32 id=toemail
name=toemail value=test@mail.com;></td>
<tr>
<tr>
<td>Subject</td><td align=middle> : </td>
<td><INPUT style="WIDTH: 255px; HEIGHT: 22px" size=32 id=subject
name=subject value=Testing></td>
<tr>
<tr>
<td valign=top>Message</td><td align=middle valign=top> : </td>
<td><TEXTAREA id=message style="WIDTH: 253px; HEIGHT: 88px" name=message
rows=4 cols=27>Hello</TEXTAREA></td>
<tr>
<tr>
<td align=middle colspan=3><INPUT type=button value="Send Mail"
onclick="javascript:sendingEMail()" id=button1 name=button1><td></td>
</tr>
</TABLE>
</P>
</BODY>
</HTML>

********************************
--
Best Regards,
James Hong