object required in java script error

[vijayakumar durai]

i am using ajax and servlet i got error object required can any body tell what is the problem

var req;
function validate() 
{
   var id = document.frmreturn.txtbookcode.value;
   var url = "AjaxServlet?id="+id; 
   alert(url);
   if (typeof XMLHttpRequest != "undefined") {
       req = new XMLHttpRequest();
   } else if (window.ActiveXObject) {
       req = new ActiveXObject("Microsoft.XMLHTTP");
   }
   req.open("post", url, true);
  req.onreadystatechange = callback;
   req.send(null);
 
}  
function callback()
 {   
	 if(req.readyState==4)
	    {
 var xmlDoc=req.responseXML;
 alert(xmlDoc);
 document.getElementById("memberid").innerHTML=xmlDoc.getElementsByTagName("memberid")[0].childNodes[0].nodeValue;  //got error in object required
    } 
 }  





AjaxServlet.java


package com.Library;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.DbCon.*;
import java.sql.*;
/**
 * Servlet implementation class AjaxServlet
 */
public class AjaxServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public AjaxServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		
	  PrintWriter out=response.getWriter();
	  String id=request.getParameter("id").replace("'","','");
	  System.out.println("enter the ajax servlet");
      DbConnection con1=new DbConnection();
      Statement stmt=null;
      ResultSet rs=null;
       String memberid="";
       String bookname="";
       String authorname="";
       String doi="";
       String dd="";
      try
      {
       String sql="select * from book_issues where bookcode ='"+id+"'"; 
        System.out.println("sql is"+sql);
       stmt=con1.getStatement();
       int status=con1.getResultset(sql);
       System.out.println("status is"+status);
       if(status>0)
       {
         String query="select memberid,bookname,authorname,DATE_FORMAT(doi,'%d-%b-%Y') as doi,DATE_FORMAT(dd,'%d-%b-%y') as dd from book_issues where bookcode='"+id+"'";
        System.out.println("query is"+query);
         rs=stmt.executeQuery(query);
          if(rs.next())
          {
           memberid=rs.getString("memberid");
            bookname=rs.getString("bookname");
            authorname=rs.getString("authorname");
            doi=rs.getString("doi");
            dd=rs.getString("dd");
            System.out.println("member id is"+memberid);
            System.out.println("book name is"+bookname);
            System.out.println("author name is"+authorname);
            System.out.println("doi is"+doi);
            System.out.println("dd is"+dd);
            response.setContentType("text/xml");
            response.setHeader("Cache-Control", "no-cache");
            response.getWriter().write("<bookissue>");
            response.getWriter().write("<memberid>"+memberid+"</memberid>");
            response.getWriter().write("<bookname>"+bookname+"</bookname>");       
            response.getWriter().write("<auhtorname>"+authorname+"</authorname");
            response.getWriter().write("><doi>"+doi+"</doi>");
            response.getWriter().write("<dd>"+dd+"</dd>");
            response.getWriter().write("</bookissue>");
             }
       }  
       else
        {
    	  response.setContentType("text/xml");
         response.setHeader("Cache-Control", "no-cache");   
         response.getWriter().write("<invalid>");
         response.getWriter().write("<bookmsg>"+"Book Id is Invalid"+"</bookmsg>");
         response.getWriter().write("</invalid>");
        }
       }
       catch(Exception e)
       {
    	   e.printStackTrace();
        }
      
	  
	}

}

[Eric Pascarello]

Your XML looks invalid to me
You are not using documentElement with responseXML
You need to debug and see what you are actually referencing.

Eric

[vijayakumar durai]

i am getting error in this line object required
document.getElementById.innerHTML=xmlDoc.getElementsByTagName("memberid")[0].childNodes[0].nodeValue;

my xml format is like this

<bookissue>
<memberid>m0001</memberid>
<bookname>c programming</bookname>
<authorname>balagurusamy</authorname>
<doi>12-oct-2009</doi>
<dd>22-oct-2009</doi>
</bookissue>

is there syntax problem in this line? can anybody tell how to get these values?

[Srikkanth Mohanasundaram]

document.getElementById.innerHTML

I hope this is a typo. You have to pass the element id to this method

  document.getElementById("elementID").innerHTML  

The XML is also invalid

<dd>22-oct-2009</doi>

Thanks,
Srikkanth

[Eric Pascarello]

vijayakumar durai wrote:i am getting error in this line object required
document.getElementById.innerHTML=xmlDoc.getElementsByTagName("memberid")[0].childNodes[0].nodeValue;

my xml format is like this

<bookissue>
<memberid>m0001</memberid>
<bookname>c programming</bookname>
<authorname>balagurusamy</authorname>
<doi>12-oct-2009</doi>
<dd>22-oct-2009</doi>
</bookissue>

is there syntax problem in this line? can anybody tell how to get these values?

You have a typo in your xml there with the dd. You XML it is invalid. Read #4 here: http://radio.javaranch.com/pascarello/2006/09/12/1158096122600.html

Eric