Solved

'null' is null or not an object error on javascript

Posted on 2008-10-07
5
511 Views
Last Modified: 2012-08-13
I've successfully set up Chat (http://www.ebrueggeman.com/phpsimplechat/index.php)
On Firefox and Google Chrome it works fine without errors, but with MSIE6,7 it complains:
'null' is null or not an object error on javascript , about this function

function user_active_ajax(myvar) {
      var chatusers = document.getElementById('div_chat_users');
      var currentuser = document.getElementById('div_current_user');
      //JS Logic
      var messageArray = myvar.split(',');
      var resultHTML='';

      for (var i=0; i < messageArray.length; i++) {
            resultHTML = resultHTML      + (messageArray[i]+'<br/>')
      }
      chatusers.innerHTML = resultHTML; <------------------------------------ error line
}

from ajax/functions.js

Ideas?
0
Comment
Question by:tomzu
5 Comments
 
LVL 5

Accepted Solution

by:
mverschoof earned 75 total points
ID: 22658197
is the script loaded before the div (div_chat_users)? If so, it doesn't know where to place the innerHTML code

Hope this helps
0
 
LVL 2

Assisted Solution

by:priya_patil
priya_patil earned 50 total points
ID: 22658239
if the error line is thid than this means that
var chatusers = document.getElementById('div_chat_users'); returns null
IE7 is not able to find any div with id "div_chat_users"
0
 

Author Comment

by:tomzu
ID: 22658548
That partly solved my problem. Is anyone willing to help more?

This is example page of chat script http://www.ebrueggeman.com/phpsimplechat/examples.php

If I use MSIE, after I post a message, all messages dissapear. When you post again, they show up for some time (~2sec) then dissapear again.
0
 

Author Comment

by:tomzu
ID: 22684922
Solved by myself :)
0
 
LVL 42

Expert Comment

by:David S.
ID: 22685225
For anyone who finds this later, would you please tell us what the problem turned out to be and what your solution was?
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

jQuery is a JavaScript library that greatly simplifies JavaScript programming. AJAX is an acronym formed from "Asynchronous JavaScript and XML."  AJAX refers to any communication between client and server, when the human client does not observe a…
This article demonstrates how to create a simple responsive confirmation dialog with Ok and Cancel buttons using HTML, CSS, jQuery and Promises
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

896 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now