Solved

AJAX PHP Chat load Iframe and scroll to the bottom

Posted on 2008-10-31
1
873 Views
Last Modified: 2008-11-01
Hello,

I have a fairly simple question, but I cannot seem to get it to work. I am creating a simple online chat application, and the html page for the chat contains a textbox to submit new messages. The html page also contains an iframe to another html page that dynamically loads the messages. The problem I am having is that I want the iframe to scroll to the bottom when the page is first loaded and when the user posts a new message. I also want to be able to detect when the scrollbar is at the bottom and when another user posts the scroll bar scrolls to the bottom displaying the new message. If you could help me out with this I'd really appreciate it. If you could show me how I might go about doing this and provide some code examples, I'd really appreciate it.

Here is a snippet of the html page that contains the iFrame:
<!-- Here is where the AJAX Javacript code is -->
 
 
<table width="100%"  border="0" cellpadding="3" cellspacing="4" bgcolor="#000000">
<tr>
  <td bgcolor="#006699">Chat App</td>
</tr>
<tr cellpadding="0" cellspacing="0">
<td bgcolor="#ffffff" cellpadding="0" cellspacing="0">
 
<div bgcolor="#ffffff">
<iframe frameBorder="0"
src ="get_messages.html"
width="100%">
</iframe></div>
</td>
</tr>
<tr>
<td>
 
  <form onsubmit="postMessage(textvalue.value)">
  <input type="text" id="textvalue"  />
  <input type="submit" value="snd"  />
  </form>
 
</td>
</tr>
</table>

Open in new window

0
Comment
Question by:tfilms
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 13

Accepted Solution

by:
Xyptilon2 earned 125 total points
ID: 22856905
Fastest non-javascript way is to place an HTML anchor at the bottom of the page like <a name='anchor'></a> And post to whatever.php#anchor

You won't need javascript for that. Or if you want to use javascript:

if (document.body.scrollHeight) {
  window.scrollTo(0. document.body.scrollHeight);
}
else if (screen.height) { // IE5
  window.scrollTo(0. screen.height);
}

something like this should work
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Search Box CSS Question 16 50
allow link tag to be submit like form 15 60
How can I split a variable 19 46
sitemap.xml 3 32
Introduction This article is intended for those who are new to PHP error handling (https://www.experts-exchange.com/articles/11769/And-by-the-way-I-am-New-to-PHP.html).  It addresses one of the most common problems that plague beginning PHP develop…
3 proven steps to speed up Magento powered sites. The article focus is on optimizing time to first byte (TTFB), full page caching and configuring server for optimal performance.
In this tutorial viewers will learn how to embed Flash content in a webpage using HTML5. Ensure your DOCTYPE declaration is set to HTML5: "<!DOCTYPE html>": Use the <object> tag to embed Flash content.: To specify that the object is Flash content, d…
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)

752 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