tutorial on js
http://developers.sun.com/scripting/javascript/ajaxinaction/Ajax_in_Action_ApB.html

quacl.style.left=width/2.25;
quacl.style.top=height/2.5;
quacl.position="fixed";

Element.show('quacl');

function getScreenMiddleHeight(){
var screenW = 640, screenH = 480;
if (parseInt(navigator.appVersion)>3) {
screenH = screen.height;
}
else if (navigator.appName == "Netscape"
&& parseInt(navigator.appVersion)==3
&& navigator.javaEnabled()
)
{
var jToolkit = java.awt.Toolkit.getDefaultToolkit();
var jScreenSize = jToolkit.getScreenSize();
screenH = jScreenSize.height;
}
return screenH/2;
}

function getScreenMiddleWidth(){
var screenW = 640;
if (parseInt(navigator.appVersion)>3) {
screenW = screen.width;
}
else if (navigator.appName == "Netscape"
&& parseInt(navigator.appVersion)==3
&& navigator.javaEnabled()
)
{
var jToolkit = java.awt.Toolkit.getDefaultToolkit();
var jScreenSize = jToolkit.getScreenSize();
screenW = jScreenSize.width;
}
return screenW/2;
}

http://bluerobot.com/web/css/center1.html

body {
margin:50px 0px; padding:0px;
text-align:center;
}

#Content {
width:500px;
margin:0px auto;
text-align:left;
padding:15px;
border:1px dashed #333;
background-color:#eee;
}

Tomcat datasource connection pooling
http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html#Non%20DBCP%20Solutions

private static void initializeDataSource(String whichOne) throws NamingException, SQLException{
 logger.debug("entering initializeDataSource("+whichOne+")");
        
       try{
          InitialContext ic = new InitialContext();
          
          if(whichOne.equals(AppHelper.SC_DEFAULT_DS_CON)){        
         //if (dataSource == null)
          dataSource = (DataSource) ic.lookup(whichOne);  
          }
       }catch (NamingException ne){
           throw new NamingException("NamingException while looking" +
                   " up DataSource Connection " + whichOne
                   + ": \n" + ne.getMessage());
       }
 logger.debug("leaving initializeDataSource()");        
   }   

http://www.servletsuite.com/servlets.htm

in progress...

obfuscate or minimize javascript:
C:\projects\registration\WebContent\include\js>java -jar C:\java\yuicompressor-2.3.5\build\yuicompressor-2.3.5.jar combined.js -o combined-min-2008-04-21.js

creating a tld

public class myTag extends TagSupport{
}

mytag.tld

< taglib xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
    version="2.0" -->
    
  <-- description -->my excelent tag<--/ description -->
  <-- display-name -->company taglib<--/ display-name -->
  <-- tlib-version -->1.1<--/ tlib-version -->
  <-- short-name -->mytag<--/ short-name -->
  <-- uri -->http://java.sun.com/jsp/jstl/core<--/ uri -->
  <-- tag -->
    <-- description -->
       my great tag
    <--/ description -->
    <-- name -->calendar<--/ name  -->
    <-- tag-class -->com.mypackage.Calendar<--/ tag-class -->
    <-- body-content -->JSP<--/ body-content -->
    <-- attribute -->
        <-- description --> 
            the calendar obj
        <--/ description -->
        <-- name -->objname<--/ name -->
        <-- required -->true<--/ required -->
        <-- rtexprvalue -->true<--/ rtexprvalue -->
    <--/ attribute -->
   <--/ tag -->
<--/ taglib -->

accessing in .jsp

<%@ taglib uri="/WEB-INF/mytag.tld" prefix="mytag" %>
< mytag:calendar objname="myCalendar" />

http://technet.microsoft.com/en-us/sysinternals/default.aspx

http bot crawler

import org.htmlparser.Node;
import org.htmlparser.NodeFilter;
import org.htmlparser.Parser;
import org.htmlparser.filters.TagNameFilter;
import org.htmlparser.util.NodeList;

 private void runCrawl(String url, String file)throws Exception{
  URL crawlURL = new URL(url);
  URLConnection yc = crawlURL.openConnection();

  //sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
  //String encodedUserPwd = encoder.encode("kg_b05"+":"+"*****");
  //yc.setRequestProperty("Proxy-Authorization", "Basic " +encodedUserPwd);

  InputStream i = yc.getInputStream();
  FileOutputStream fos = new FileOutputStream(file);
  int in=i.read();
  while(in!=-1){
   fos.write(in);
   in=i.read();
  }
  fos.flush();
  fos.close();
 }

 private String readFile(String file) throws Exception{
  String str = "", html = "";
     try {
         BufferedReader in = new BufferedReader(new FileReader(file));
         
         while ((str = in.readLine()) != null) {
             html += str;             
         }
         in.close();
     } catch (IOException e) {
      throw e;
     }
     
     return html;
 } 

public MegaVO doMegaTask() throws Exception{
  
  
  runCrawl(SC_MEGA_URL, SC_MEGA_FILE);
  String html = readFile(SC_MEGA_FILE);
  Parser parser = new Parser();
  parser.setInputHTML(html); 
  
  NodeFilter nf = new TagNameFilter("span");
  NodeList spans = parser.parse (nf); // here is your two node list
  
  Node span = null;
  Node child = null;
  String num = "", date = "", d1 = "", d2 = "", d3 = "", d4 = "", d5 = "", mm = "";
  for(int i=0; i < spans.size(); i++){
   span = spans.elementAt(i);
   //if(span.getText().equals("span id=\"DrawResults2_lblMMNum1\"")){
   String text = span.getText();
   
   if(text.length() > 27){
    if(text.substring(0,27).equals("span id=\"DrawResults2_lblMM")){ // 27 characters deep
     String id = text.substring(27,text.length()-1);
     child = span.getFirstChild();              
     
     if(id.equals("DrawNum")){
      logger.info(child.getText());
      num = child.getText();
     }else if(id.equals("DrawDate")){
      logger.info(child.getText());
      date = child.getText();
     }else if(id.equals("Mega")){
      logger.info(child.getText());
      mm = child.getText();
     }else{
      String n = id.substring(id.length()-1);
      switch((new Integer(n)).intValue()){
      case 1:
       d1 = child.getText();
       break;
      case 2:
       d2 = child.getText();
       break;
      case 3:
       d3 = child.getText();
       break;
      case 4:
       d4 = child.getText();
       break;
      case 5:
       d5 = child.getText();
       break;
      }
      logger.info(id);      
      logger.info(child.getText());      
     }
    }
   }
  }
  
  MegaVO vo = new MegaVO(num,date,d1,d2,d3,d4,d5,mm);
  logger.info(vo.toString());
  return vo;
 }