How to connect applet with database from browser

I'm looking for a way to connect my applet with DB from browser using glassFish Server. It's working when I run it with AppletViewer but when I tried to open it in the browser, it gave me an exception: no Suitable Driver Found.

This is my method:

public Connection getConnection(){
    try {
        Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
    } catch (Exception ex) {
    }

    try {
        conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","stage","stage");
        System.out.println("connect");
    } catch (SQLException ex) {
        System.out.println(ex.getMessage());
    }

    return conn;   
}

this is the HTML page < jsp:plugin type="applet" codebase="." code="classes/MapApplet.class" archive="applet.jar,ojdbc6.jar" width="1350" height="747" > < /jsp:plugin>