parent.document.getElementById from iFrame to parent not working

Posted on 2013-05-14
Last Modified: 2013-05-14
An "onClick" call to a Javascript function to set the href of a button on a toolbar does not find the button when the call is made from an iFrame. The toolbar is in the main window.

alink = parent.document.getElementById('members_link');
alink = window.parent.document.getElementById('members_link');

This works when the link clicked is in the main window; it only fails when the link is in the iFrame.

I'm using Chrome, but also tested IE8.

Here's the menubar button:

<a id=members_link
      onmouseover=\"roll_over('members_button', 'images/menubar_Members_hi.jpg');\"
      onmouseout= \"roll_over('members_button', 'images/menubar_Members.jpg');\"
      href=\"directory.php\" target=main
      ><img class=menu_image src='images/menubar_Members.jpg' NAME=members_button></a>

The page only has this one iFrame.
Question by:wilri01
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
  • 4
  • 3
  • 2
LVL 42

Expert Comment

ID: 39163931
try this from inside the iframe:
var alink = parent.$(parent.document).getElementById('members_link');

Open in new window

LVL 42

Expert Comment

ID: 39164027
that might also work:
var alink = parent.$("members_link");

Open in new window


Author Comment

ID: 39164032
What do I need to do to use JQuery?
What Is Transaction Monitoring and who needs it?

Synthetic Transaction Monitoring that you need for the day to day, which ensures your business website keeps running optimally, and that there is no downtime to impact your customer experience.

LVL 42

Expert Comment

ID: 39164061
add this:
<script src=""></script>

Open in new window


Author Comment

ID: 39164683
Sorry, but neither form works.
LVL 22

Accepted Solution

Kim Walker earned 500 total points
ID: 39165960
The parent document and iframe document must be in the same domain for the child iframe document to access the parent DOM. It is considered a security issue when the documents are in separate domains.

Author Comment

ID: 39166437
Yes, I was aware of that, but it is the same domain.

BUT... you got me thinking.  I looked at how the link is being constructed for the button, and found it includes "www." and the URL I used to get ot the page left that off.

So I add "www." to the URL, and the Javascript code now works!

So the problem is, how can I tell if the user entered the "www.", or left it off?  Maybe use a relative HREF that doesn't include the domain name?

Maybe some kind of "rewrite" in Apache to add the "www." if it isn't entered?

God, I'm so happy to see this working at all!  THANK YOU SO MUCH!!!
LVL 22

Expert Comment

by:Kim Walker
ID: 39166502
Can you use a relative url in the button link?

Author Closing Comment

ID: 39166892
The trick is to NOT include the "www." in the link.  Then the user can use, or not use, the "www." and it works.

I've been working on this off and on for almost a year.  It feels so good to see this work!

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

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

In Part 1 ( we covered the hexagonal maze basics -- how the cells are represented in a JavaScript array and how the maze is displayed.  In this part, we'…
This article discusses the difference between strict equality operator and equality operator in JavaScript. The Need: Because JavaScript performs an implicit type conversion when performing comparisons, we have to take this into account when wri…
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…

691 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