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Label focus does not change css style

I have a simple form and wanted to highlight the focused labels by changing their background colors, but the jquery doesnt seem to work here.
The console does not show any errors. Could someone please help me on this?
<form action="" method="POST" id="qrForm">
<label for="enter1">Enter<input id='enter1' type="radio" name="enter"></label>
<label for="enter2">Exit<input id='enter2' type="radio" name="enter"></label><br>
<label for="device1">Took a device<input id="device1" type="radio" name="device"></label>
<label for="device2">Returned a device<input id="device2" type="radio" name="device"></label>
</form>
<script>
$("label").focus(function(){
$(this).css('background-color', '#00CC66');
});
</script>
I could actually finish it by adding/removing a class but I wonder why this one isn't working.

why use js when you can do it in CSS?
label:focus {
background-color: #00cc66;
}
you also want to add tabindex=0 if you want your label elements to be focusable though, as if you e.g. click on a label, the focus is moved to the related input element
Alternatively, you can use the css next sibling selector as below:
html:
<input type="text" id="foo" class="foo"><label for="foo">label</label>
and the css:
.foo:focus + label {
background-color: #00cc66;
}
or play with different markup and css selectors

You cannot trigger focus for a label using .focus() instead do it with input, Check here
$("input").focus(function(){
$('label').css('background', '#00CC66');
});
or
$("input").focus(function(){
$(this).closest('label').css('background', '#00CC66');
});

try this as you can't use focus on label -
$( "form input:radio" ).focus(function(){
$(this).parent('label').css('background-color', '#00CC66');
});

How to hide label based on child value using jquery

I want to hide an element and a label based on value:
My html code looks like this
<form id="wrapper">
<label>
<input type="checkbox" value="Slider">
Slider
</label>
</form>
So using jquery i can find an input value that contains value="Slider" but the label still remains, because it it doesn't contain any id or class and I can't add anything there, so how can I hide it
$('#wrapper').find("input[value='Slider']").each(function(){
$(this).hide()
});
Here is a JSFIDDLE.

You need to hide the parent label element to hide input element and its sibling text:
$('#wrapper').find("input[value='Slider']").closest('label').hide();

Use .has() method to checking children of element.
$("label").has("input[value='Slider']").hide();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label>
<input type="checkbox" value="Slider">
Slider
</label>
<label>
<input type="checkbox" value="Slider2">
Slider2
</label>

You can try this:
$('#wrapper').find("input[value='Slider']").each(function(){
// $(this).hide(); If you want to hide input too
$(this).parent().hide();
});

Make a checkbox look like a button CSS

I think what I am trying to achieve can be done in a simpler manner. However I have little JS experience and none in the way of CSS. So I’m utilizing prebuilt CSS and JS code and subtlety modifying it. So I will explain my end goal and see if what I currently have is acceptable.
A top menu on the webpage that has push buttons and checkboxes that all visually look the same
I would like checkboxes to look like buttons, e.g. no checkbox only the label.
I would like for the checkbox to still retain its functionality as a checkbox given the JS code it is calling
Is the way I’m calling the JS code through the button and checkbox correct or too complicated?
JSFiddle
<li><a title="Zoom to U.S" input type="button" name="US" onclick="US();"><span>Zoom to U.S.</span></a></li>
<li><a title="Test 1 KML"><input type="checkbox" id="kml-red-check" name="kml-red-check" onclick="toggleKml("red");"><span>Test 1 KML</span></a></li>

.hidden {
position: absolute;
visibility: hidden;
opacity: 0;
}
input[type=checkbox]+label {
color: #ccc;
font-style: italic;
}
input[type=checkbox]:checked+label {
color: #f00;
font-style: normal;
}
<input type="checkbox" class="hidden" name="cb" id="cb">
<label for="cb">text</label>
http://css-tricks.com/almanac/selectors/c/checked/
Won't work on lt IE9 though.
edit: Following your markup it should be something like this:
<ul>
<li><input id="cb1" name="cb1-name" type="checkbox" onkeypress="setTimeout('checkIt(\'cb1\')',100);"><label for="cb1" onclick="setTimeout('checkIt(\'cb1\')',100);">text 1</label></li>
<li><input id="cb2" name="cb2-name" type="checkbox" onkeypress="setTimeout('checkIt(\'cb2\')',100);"><label for="cb2" onclick="setTimeout('checkIt(\'cb2\')',100);">text 2</label></li>
</ul>
And then check if the checkbox is checked or not in your function.
onchange / onclick in a checkbox doesn't work in IE
edited again: changed NAME attribute so you won't end up having problems further along the line. And added a little workaround for the unresponsive, though ultimately desired, onchange functionality in IE8. Eventually you should add a timer to your function, rather than inline.
function checkIt(e){
if(document.getElementById(e).checked){
alert('checked');
} else {
alert('unchecked');
}
}

It is not possible to change the appearence of a checkbox so radically using CSS.
What you CAN do though, is style a label element enough to make it look like a button. Due to the nature of the label element, clicking it will toggle the state of the checkbox keeping your functionality intact.
Here is how to do it
Markup
<li>
<label for="kml-red-check">I am a button!</label>
<input type="checkbox" id="kml-red-check" name="kml-red-check" onchange="toggleKml("red");">
</li>
Note that I've changed the onclick handler to onchange since now it is impossible to click the checkbox itself. Its value changes though when you click on the label
Styling
label[for="kml-red-check"]{
//Your CSS goes that makes the label look like a button goes here
}
#kml-red-check{
display:none;
}

<label>
<input type="checkbox" ng-model="vm.abc" ng-change="vm.go()"/>
<span>this is button add some css to lokking like a button</span>
</label>
this will work like button , if you don't want to show checkbox use this
<label>
<input type="checkbox" ng-model="vm.abc" ng-change=vm.go()" hidden=''/>
<span>this is button add some css to lokking like a button</span>
</label>
check it out here https://jsfiddle.net/h0ntpwqk/2/

stop label from toggling the input checkbox

I have the following html code. When clicking on the label it toggles the checkbox.
<td><label for="startClientFromWebEnabled">Client Launch From Web:</label></td>
<td><input type="checkbox" id="startClientFromWebEnabled" name="startClientFromWebEnabled" data-bind="checked: StartClientFromWebEnabled, enable: IsEditable" onchange="startClientFromWebToggleRequiredAttribute()" /></td>
How can I prevent this? If I remove the for="startClientFromWebEnabled", It stops toggling but I need this because I have some logic that takes the id from the element that fires the event ...

The best solution would be to let label toggle the checkbox as that is intuitive and expected behaviour.
Second best solution is to make sure your checkbox is not nested inside label and label does not have for attribute. If you have some logic that depends on it, you can put data attributes on elements and use those in your logic.
<input type="checkbox" data-myid="1" />
<label data-myid="1">foo</label>
Last resort
You could prevent the default behaviour of the click event using jQuery:
$('label[for="startClientFromWebEnabled"]').click(function(e) {
e.preventDefault();
});​
Please see this jsFiddle for an example.

There is CSS solution too:
label {
pointer-events: none;
cursor: default;
}

if you are using JQuery, add an id on your label then
add this in your script:
$("#lbl").click(function(){
return false;
});

Just prevent default on label or any part of label, if desired.
document.querySelector('.prevent-default').addEventListener('click', (e)=>{
e.preventDefault();
}, false);
<input type="checkbox" id="1" />
<label class="prevent-default" for="1">foo</label>
or
document.querySelector('.prevent-default').addEventListener('click', (e)=>{
e.preventDefault();
}, false);
<input type="checkbox" id="1" />
<label for="1">foo some part <span class="prevent-default">not</span> clickable</label>

"I have some logic that takes the id from the element "
You could remove the for-attribute, if you store the ID somewhere else. For example in a data-*-attribute:
<label data-input-id="startClientFromWebEnabled">
On the other hand, it is sometimes difficult to point and click an a check-box based on the styling and the capabilities of the user. There is are good reasons for using the for-attribute.

How can my input element receive onclick events when it is set to disabled?

I need to have an onclick/hover event on an input tag which is disabled.
Is there another way but to wrap it in another tag and give that tag the events?
<input type="checkbox" onclick="cant_choose('event')" disabled="disabled" value="2" name="enroll_to[event][]">

You could simulate it being disabled with JavaScript and CSS.
That is, blur all focus it receives, and add a class with something like so.
input.disabled {
background: #d4d0c8;
color: #888;
cursor: default;
}
Update
See it in comparison with the normal and browser disabled input box on JSbin.

You could wrap the input field inside a container and bind the click event on it.
<div id='input-container'>
<input id='myText' disabled />
</div>
<script>
$('#input-container').click(function() {
alert('test');
});
</script>
http://jsfiddle.net/M2EYH/
If you have multiple disabled fields, and don't want to make an unique ID for each container, you can give the containers a class name instead of an ID.