为什么将applet嵌入网页就不能访问数据库了? 在eclipse中可以访问，但嵌入网页就不可以了？

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.net.*;

public class Landing2 extends Applet {

Label id = new Label("账号");
Label password = new Label("密码");
TextField idin = new TextField("请输入账号",20);
TextField passwordin = new TextField("请输入密码",20);
Button landing = new Button("登陆");
Button register = new Button("重置");
static boolean inlanding = false;

public void init(){
add();
}

public void add(){
this.setSize(250,100);
add(id);
add(idin);
add(password);
add(passwordin);
add(landing);
add(register);

landing.addActionListener(new ButtonLanding(idin,passwordin));
register.addActionListener(new ButtonReset(idin,passwordin));
}
}

class ButtonLanding implements ActionListener{

String select;
String id;
String password;
TextField inid;
TextField inpassword;

ButtonLanding(TextField inid,TextField inpassword){
this.inid = inid;
this.inpassword = inpassword;

}

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
Connection con;
Statement sql;
ResultSet rs;

id = inid.getText();
password = inpassword.getText();
//inpassword.setText(id + password);

select = "SELECT * FROM employee where ID = '" + id+"' and Password = '"+password+"'";
System.out.println(select);

try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}catch(ClassNotFoundException e1){
System.out.print(e1);
}
try{
con = DriverManager.getConnection("jdbc:odbc:star","","");
sql = con.createStatement();
rs = sql.executeQuery(select);
if(rs.next()){
String id = rs.getString("ID");
String password = rs.getString("Password");
System.out.println(id + " "+password);
if(id != null && password != null){
Landing2.inlanding = true;
this.inpassword.setText("密码正确 ！");
}
}else{
Landing2.inlanding = false;
inpassword.setText("密码错误！");
}
System.out.println("Landing2.inlanding = "+Landing2.inlanding);
con.close();
}catch(SQLException e1){
System.out.println(e1);
}
//this.inpassword.setText(""+Landing2.inlanding);
}

}

class ButtonReset implements ActionListener{
TextField id;
TextField password;
ButtonReset(TextField id,TextField password){
this.id = id ;
this.password = password;
}
@Override
public void actionPerformed(ActionEvent e){
id.setText(null);
password.setText(null);
}
}