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On page reload entire focus on an id

I'm working on some accessibility stuff for a client and the site is basically in Ruby on Rails but I know this needs some JS that I'm pretty weak with. The site has three links that then trigger an iframe. So it's something like this:
<%=link_to("Alpha", "#alpha")%>
<%=link_to("Beta", "#beta")%>
<%=link_to("Gamma", "#gamma")%>
<iframe src="<%=#url%>" width="100%" height="500px;" id="myFrame" tabindex="0" title="<%=#title%>"></iframe>
<script>
window.onload = function() {
document.getElementById("myFrame").focus();
};
</script>
I'm testing the screen reading using ChromeVox and on page load/and reload it will read off the navigation from the top of the page. The keyboard focus is definitely on the iFrame but it reads through the entire page.
So how do I force the entire focus on the iFrame on a page reload?

This answer here seems like it may work for you. That would mean updating your code to have the aria-live attribute "assertive", such as:
<iframe src="<%=#url%>" width="100%" height="500px;" id="myFrame" aria-live="assertive" tabindex="0" title="<%=#title%>"></iframe>

Changing an iframe SRC dynamically

What I have and I need to do it work properly is when I'm in a "start page" and I click a button like this:
PAGE-1
Point A
It should send me to "another page" where I load dinamically an iframe taking each variable (shopID, type, max-levels and point) from the URL and print it like an iframe this way:
PAGE-2
<iframe id="frame" src="http://myappwebsite/resourcesiframe?shopId=3366&type=image&point=A" width=“XXX" height=“XXX"></iframe>
I've used this javascript snippet but anyway, I can't make it work properly at all.
$(".map-button").click(function (e) {
e.preventDefault();
$("#frame").attr("src", $(this).attr('data - iframe - src'));
});
I only need to get the variables from the data-iframe-src and use them in the iframe, but I'm not able... The problem is that I load elements in different pages, so I don't know how this affect to the URL variables.

I've founded a simple solution for my problem here and it works for me.
First of all I put this simple iframe in my PAGE-2:
<iframe id="frame" src="" width="100%" height="auto" frameborder="0" scrolling="yes"></iframe>
Then in PAGE-1 I've used this type of links:
https://myappwebsite/page-2?shopId=1234&type=image&max-levels=1&point=A
So now my PAGE-2 loads properly with these params in the URL. Then I've used this simple snippet in Javascript to fill my iframe in PAGE-2:
<script type="text/javascript">
$( document ).ready(function() {
$("#frame").attr("src", "https://myappwebsite/resourcesiframe" + window.location.search);
});
</script>
And it works! Now I can go to PAGE-2 with all my params, pick them and use them in SRC inside the blank iframe.
Thanks for getting me in the correct path!

Embed (iframe or object) and Modify (jQuery) webpage

I'm simply trying to load another webpage in my webpage using the object tag or iframe. Then, I would like to remove some element of the loaded page with jQuery.
Here is my code
<div>
<object type="text/html" data="http://ebird.org/ebird/map/eurtre1" width="100%" height="400px" id="eurtre1">
</object>
</div>
<script>
jQuery( window ).load(function() {
jQuery('#map-sidebar').remove();
});
</script>
And, as you guess, it is not working...
I have tried:
jQuery('#eurtre1').contents().find('#map-sidebar')
and
jQuery('#eurtre1')[0].contentDocument.children
The wired thing is that on my browser, I can do it in the console, once I've selected the inside of the object...
Any idea ?

Here's a link to a similar question:
how to access an iframe and affect it with jQuery
Basically you can't due to Javascript same-origin policy but if you have access to the loaded content in the iframe you could use window.postMessage
You could also add a parameter to the iframe's src tag to post a message, something like this:
<iframe src="http://www.example.com?hideElement=true"></iframe>
Again you will have to have access the content of the iframe to check the param and execute your code.

Unable to change HTML iframe source with Javascript

I'm trying to have a 'video of the day' on my website. I currently have most of this working, and here's how I plan to have it working in the end:
Have a Python script run once every 24 hours to pick the random YouTube video of the day
Write the embedded video URL to a text file
Use Javascript to access the text file and grab the video URL, and use it as the iframe source on my webpage
As I mentioned above, this plan is currently working for the most part. My script is able to pick the random video, and write it to a text file. My web page is then able to pull the video URL from the text file, and write it to the webpage in text form. However, I'm having some troubles having it write the video URL to my iframe.
I did some searching, and people suggested trying the following code:
<iframe id="mainvideo" width="720" height="480" frameborder="0" src="" allowfullscreen></iframe>
<script>
document.getElementById("mainvideo").src =
finalresult + ReturnURL();
</script>
So earlier in my code, I declared the variable 'finalresult' to be the following value: //www.youtube.com/embed/WJDnJ0vXUgw
When I have Javascript write 'finalresult' to my webpage, it will write the video URL as text to the webpage as expected. However, when I try and declare it as the source for the iframe, I end up with a blank iframe on the page.
Does anyone know what the problem is with my code for it not showing this video in my iframe? Any help would be appreciated.

You must be changing the src after any particular event is fired. So try this way,
HTML :
<iframe id="mainvideo" width="720" height="480" frameborder="0" src="http://www.bing.com/" allowfullscreen></iframe>
<button id="changeSrc">Change iFrame</button>
javaScript :
var iframe = document.getElementById("mainvideo");
changeSrc.onclick = function(){
iframe.src = "http://www.w3schools.com/";
};
jsFiddle
Update 1 :
If you want to change the iframe src attribute after page load then go with this way,
window.onload = function(){
var iframe = document.getElementById("mainvideo");
iframe.src = "http://www.w3schools.com/";
};
jsFiddle

If myframe.src does not work for you, then try out myframe.contentWindow.location.href like in this pen.

Accessing element inside iFrame returning null

I have a form that posts to an iFrame. The website inside the iFrame is something I have no control over. However I would like to set the display of a few images inside the iframe to "none".
<form id="testForm" method="post" target="testFrame">
<input type="hidden" name="RequestXML" ID="RequestXML" value="<Request><RedirectURL>Account/TokenRequest</RedirectURL></Request>"
</form>
<iframe id="testFrame" name="testFrame" frameborder="0" style="width:1000px;height:500px"> </iframe>
Here is my script at the top of the page:
<script type="text/javascript">
$(function () {
$("#testForm").attr("action", "http://externalwebsite.aspx");
$('#testForm').submit();
var iframe = document.getElementById('testFrame');
var innerDoc = iframe.contentDocument || iframe.contentWindow.document;
//alert($("#testFrame").contents().find("body").html());
//alert(innerDoc.innerHTML);
});
</script>
Both my alerts return null in Chrome, IE and firefox. What is the best way to access the elements inside that iframe. (in chrome i dont even see the html of that website when I try to do "inspect element" and view the html)
By the way I am doing all this in a MVC4 project

Assuming this is not a cross-domain issue, try:
var body = $('#testFrame').contents().find('body');

Since this cross domain you have two options.
if you have access to the iframe code, then you can place XDM code in there, maybe easyXDM would help.
Or
you have to go server side and get your php/asp.net etc backend to go get the page and get what data it needs.