ajax.html

<html>
<head>
<title> Ajax at work </title>
<script language = "javascript">
var XMLHttpRequestObject = false;
if (window.XMLHttpRequest) 
{
	XMLHttpRequestObject = new XMLHttpRequest();
} 
else if (window.ActiveXObject) 
{
	XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
}

function getData(dataSource, divID)
{
	if(XMLHttpRequestObject) 
	{
		var obj = document.getElementById(divID);
		XMLHttpRequestObject.open("GET", dataSource);
		XMLHttpRequestObject.onreadystatechange = function()
		{
			if (XMLHttpRequestObject.readyState == 4 && XMLHttpRequestObject.status == 200)
			{
				obj.innerHTML = XMLHttpRequestObject.responseText;
			}
		}
		XMLHttpRequestObject.send(null);
	}
}
</script>
</head>
<body>
<h1> Fetching data with Ajax </h1>

<FORM ACTION="ShowParameters"
      METHOD="POST">
  Item Number:
  <INPUT TYPE="TEXT" NAME="itemNum"><BR>
  Quantity:
  <INPUT TYPE="TEXT" NAME="quantity"><BR>
  Price Each:
  <INPUT TYPE="TEXT" NAME="price" VALUE="$"><BR>
  <HR>
  First Name:
  <INPUT TYPE="TEXT" NAME="firstName"><BR>
  Last Name:
  <INPUT TYPE="TEXT" NAME="lastName"><BR>
  Middle Initial:
  <INPUT TYPE="TEXT" NAME="initial"><BR>
  Shipping Address:
  <TEXTAREA NAME="address" ROWS=3 COLS=40></TEXTAREA><BR>
  Credit Card:<BR>
    <INPUT TYPE="RADIO" NAME="cardType"
                     VALUE="Visa">Visa<BR>
    <INPUT TYPE="RADIO" NAME="cardType"
                     VALUE="Master Card">Master Card<BR>
    <INPUT TYPE="RADIO" NAME="cardType"
                     VALUE="Amex">American Express<BR>
    <INPUT TYPE="RADIO" NAME="cardType"
                     VALUE="Discover">Discover<BR>
    <INPUT TYPE="RADIO" NAME="cardType"
                     VALUE="Java SmartCard">Java SmartCard<BR>
  Credit Card Number:
  <INPUT TYPE="PASSWORD" NAME="cardNum"><BR>
  Repeat Credit Card Number:
  <INPUT TYPE="PASSWORD" NAME="cardNum"><BR><BR>
  <CENTER>
    <INPUT TYPE="SUBMIT" VALUE="Submit Order">
  </CENTER>



<input type = "button" value = "Display Message"
onclick = "getData('ShowParameters.java', 'targetDiv')">
</FORM>
<div id="targetDiv">
<p>The fetched data will go here.</p>
</div>
</body>
</html>

ShowParameters.java

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public class ShowParameters extends HttpServlet {
  public void doGet(HttpServletRequest request,
                    HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
     out.println( "<BODY>\n" +
                "<TABLE BORDER=1 ALIGN=CENTER>\n" +
                "<TR>\n" +
                "<TH>Parameter Name<TH>Parameter Value(s)");
    Enumeration paramNames = request.getParameterNames();
    while(paramNames.hasMoreElements()) {
      String paramName = (String)paramNames.nextElement();
      out.println("<TR><TD>" + paramName + "\n<TD>");
      String[] paramValues = request.getParameterValues(paramName);
      if (paramValues.length == 1) {
        String paramValue = paramValues[0];
        if (paramValue.length() == 0)
          out.print("<I>No Value</I>");
        else
          out.print(paramValue);
      } else {
        out.println("<UL>");
        for(int i=0; i<paramValues.length; i++) {
          out.println("<LI>" + paramValues[i]);
        }
        out.println("</UL>");
      }
    }
    out.println("</TABLE>\n</BODY></HTML>");
  }

  public void doPost(HttpServletRequest request,
                     HttpServletResponse response)
      throws ServletException, IOException {
    doGet(request, response);
  }
}

plz tell me wats wrong with my code..wat changes sud i make for this to work ?

Its an ajax program with form and servlet..when i click on the Display button the table sud be displayed on the same page unlike wat happens when i click the submit button which takes me to another page.

You shouldn't be accessing the file itself. You should access the servlet on how you access it on your browser. It should be something like http://localhost/site/ShowParameters? I hope you get the point.

i got that..
but my point is that the test sent by the first
out.println(" "); is printed on my browser window. In this case ...only the header of the table is printed.
I need to whole table to get printed