Develop Reference

Don't display anything below some element

is it possible to hide every content after a certrain element (e.g. after a certain class of div)?
The problem is: I'm using a 1&1 webpage builder with a layout-template (annoying like hell) because of my boss. I'd like to remove the footer, but nothing has worked yet as it seems that the template prevents me from hiding the footer with simple CSS (I'm happy for any suggestions here as well).
But maybe it's possible to hide anything that comes after a certain element like a div or image (or whatever) so that I can put the element right before the footer?
Thanks in advance.

You should be able to use JS if it is possible on 1&1.
As you probably have JQuery you can do it like this:
$('.footer-class').remove();
or
$('.footer-class').css('display', 'none');
I don't think that 1&1 would have different classes or ids for footers each time someone refreshes it, so I think it should work.
Please provide a working example or your website address. This will help us.

Can you give us the footer's classes, id and all attributes? The simplest solutions is style="display:none" added to the footer

Linking to an ID inside a Bootstrap nav-tab

We are using Bootstrap nav-tabs on our new website's events pages to create different sections on a single page related to our events — About, Speakers, Travel, Register and so on.
Our events coordinator would like to be able to link directly to the individual speakers who appear on the Speakers tab from outside the website. Normally, this is pretty simple — http://domain.name/events/eventspage#speakerID.
However, because we're using nav-tabs, there isn't an easy and obvious way of creating this link. I've looked through posts here and elsewhere to see if anyone else has addressed this problem, but have yet to find anything.
The site was built using Bootstrap 3 and uses ExpressionEngine 2.10 as the CMS.
You can view a working example of how our events pages are set up at https://www.rjionline.org/events/rjicollab.
Any suggestions would be appreciated.

This is how it can work with jQuery:
Select an anchor within a JQUERY Tab from a link on anther webpage
You can adapt the code from there.

Here you can try this function:
function goToTab(){
var hash=document.location.hash,
prefix="tab_";
if(hash)
$('.nav-tabs a[href='+hash.replace(prefix,"")+']').tab('show')
};

Change main content on a webpage using bootstrap

I am building a webpage using Bootstrap 3. I am trying to find the best way to change the main content of the side. I have a Header, left content and right content but I want to change the middle content by pushing a button without changing the surrounding elements. What would be the best thing to use to accomplish this. Is there some demos online that someone can point out? I have been trying to find some but without luck.

Bootstrap doesn't have that feature. First try to learn what bootstrap can do or can't, what bootstrap made for.
What you are trying to do is called templating. You can use php, ajax or other methods to dynamically add content to your content section of your template.

You have many ways to do that, maybe with jQuery .load() and maybe combined with HTML5 history API or some other framework...
But Bootstrap has nothing to do with that..
You can start reading about AJAX and DOM manipulation first, but here is some link you can use:
Dynamically Loading Content in Twitter Bootstrap Tabs

You cannot do that with boot strap that is just not what it's made for you can use either PHP or Ajax personally if you know PHP already and have everything set up for go with that because in my opinion Ajax sucks to learn and work with

JQuery Mobile, Querystrings and Multiple Page Id's

I'm having trouble figuring out where I am going wrong with my JQuery Mobile site. I have a link to another JQuery Mobile page that uses a querystring. The link looks like this.
<li>News</li>
All normal internal JQuery Mobile links do not produce the problem. Only links that go to another JQuery Mobile page with a querystring produce this problem. The problem is when the above link is clicked my dom goes from looking like this.
To looking like this.
Images are hard to see on SO, so here they are on imgur.
http://imgur.com/a/2Z1Ss
These are firebug DOM views of what the initial page and second page looks like. My question is why are there now two DOM element with the same exact ID? This is, and correct me if I'm somehow wrong, not a valid HTML page once this link has been clicked. If I am using querystrings in JQuery Mobile, then what best practice am I missing that is causing this problem?
What do I need to do to avoid the multiple ID's on the same page as they are causing problems with my javascript functions. I'm baffled by this problem, but hopefully some JQM pro can explain to me what I'm doing wrong. I'm sure it's something silly.

As I thought I was doing something silly. My index.php had a page with id="frontpage" along with my section.php had a page with id="frontpage". I just gave the section.php page a new id and the page is now valid and my functions work properly.

How does one properly test a javascript widget?

So, I've written a little javascript widget. All a user has to do is paste a script tag into the page, and right below it I insert a div with all of the content the user has requested.
Many sites do similar things, such as Twitter, Delicious and even StackOverflow.
What I'm curious about is how to test this widget to make sure that it will work properly on everyone's webpage. I'm not using an iframe, so I really want to make sure that this code will work when inserted most places. I know it looks the same in all browsers.
Suggestions? Or should I just build one hundred web pages and insert my script tag and see if it works? I would hope there is an easier way than that.

Once you have confirmed that your javascript works cross-browser in a controlled environment, here are some things that might cause problems when used on an actual website:
CSS
You're using a CSS class that is already being used (for a different purpose) by the target website
You're using positioning that might interfere with the site's CSS
The elements you are using are being styled by the website's CSS (you might want to use some sort of "reset" CSS that applies only to your widget)
HTML
You're creating elements with the same id attribute as an element that already exists on the website
You're specifying a name attribute that is already being used (while name can be used for multiple elements, you may not be expecting that)
Javascript
What is the expected behaviour without Javascript enabled? If your script creates everything, is it acceptable for nothing to be present without JS?

At very basic you should make sure your widget works for following test-cases. I am sure then it will work on all web-pages -
http/https: There should not be any warning for HTTPS pages for unencrypted content.
<script> / <no-script>: What if JavaScript is disabled? Is your widget still visible?
What happens when third-party cookies are disabled? Does your widget still work?
Layout-box restrictions: When parent div element's size is less than your widget. Does your widget overflow the given size and destroys owners page?

By keeping all your Javascripts under a namespace (global object) with a very unique name, you should be pretty much OK. Also, you can simply use an anonymous function if you just want to print out something.
Similar question: How to avoid name clashes in JavaScript widgets