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jQuery - Select an element by ID not working

I'm trying to select an element and then add / remove a class. I have achieved this plenty of times with other elements, however for this one it doesn't want to work.
My html is as follows:
<div>
<a class="login-headerText" id="hypLogin" style="padding-right:5px; float:left" >Login</a>
<h4 class="login-headerText" style="font-weight:bold; padding-right:5px; float:left">/</h4>
<a class="login-headerText" id="hypCreateAccount">Create Account</a>
</div>
The div is wrapped inside another div. (id=modal)
I want to select "hypLogin" then add a class to it on click. It works if i do this in the onClick event, however it wont work in a seperate script. (The script is referenced and works as it is used for other elements)
This is my jQuery
$('#hypLogin').click(function () {
$(this).removeClass('login-headerText').addClass('login-headerText-Unselected');
});
Tried debugging it and it's not getting hit at all.
Probably something really simple.

Couple of things:
you must do it on:
$( document ).ready(function() {
});
Does these elements printed dynamically?
try to use:
$('#hypLogin').on('click', function () {
});
try to put your code on modal open event.

Here is working fiddle
try this:
$(document).ready(function () {
$('#hypLogin').click(function () {
$(this).removeClass('login-headerText').addClass('login-headerText-Unselected');
});
});

jQuery function to only run on the element clicked

I'm trying to implement an accordian style box on some content. However there are 4-6 of these boxes on 1 template, all with different classes for obvious reasons. However I want to try and make the code as easy to read as possible and I don't want to duplicate the code for each class name. I'm assumung jQuerys (this) method would work but i'm not 100% sure how to use it.
Here is my JS code:
<script type="text/javascript">
$(document).ready(function(){
$(".block-50_hoverHeader").click(function (){
//alert("clicked");
$(".scrollText").slideToggle(1000);
});
});
</script>
So the .scrollText class is the div that holds all the content which needs to be displayed after the onClick function. But currently when I click the header all the .scollText divs appear on the page. So i want it to only appear on the parent header div that is being clicked.
Here the HTML:
<div class="block-50 left textHoverWrapOne">
<img src="" alt="" /> (Image working as BG Image)
<div class="block-50_hoverHeader"><p>This is a header!</p></div>
<div class="block-50_textHoverOne trans_click scrollText">
This is the content that needs to be displayed after the
</div>
</div>

Find the scrollText relative to the clicked block-50_hoverHeader element. In this case it is the next sibling, so you can use .next()
Inside the event handler this points to the element in which the handler is registered, in this case it is the block-50_hoverHeader element, so we can find the next scrollText using $(this).next()
jQuery(function ($) {
$(".block-50_hoverHeader").click(function () {
$(this).next().slideToggle(1000);
});
});
Demo: Fiddle

There are a number of ways to accomplish this. I prefer to grab the shared parent and then use find as I find this is a bit less likely to break due to minor modifications to the html structure.
$(".block-50_hoverHeader").click(function (){
$(this).closest(".textHoverWrapOne").find(".scrollText").slideToggle(1000);
});

Why not targeting the whole div??
jQuery(function ($) {
$(".block-50").click(function () {
$(this).find('.scrollText').slideToggle(1000);
});
});

Preventing event bubbling (for javascript onclick events)

I am using javascript to interact with a CMS which provides a button for users to add things to their basket.
However, I am using the javascript to try and prevent the customer from doing so unless they have made a selection from a drop-down menu elsewhere on the page.
As there are many different buttons that could potentially get them to the basket (including the example below) and all of which have different methods for doing so, rather than write many lines of code to prevent each method and then re-enable that method when a selection is made I am trying to do a kind of 'catch-all' fix where I just cover any such buttons / links with another div so as to effectively 'mask' the button below it until they make a decision.
I first tried to use absolute positioned divs to do this which works beautifully until the user does something like re-size a textbox on the page and then suddenly my absolutely positioned div is in the wrong place!!
So I'm now using JQuery's .wrap() which solves this problem nicely.. BUT.. Now I can't use z-index to position the div above the required buttons as those buttons are within the mask not below it!
I have done a lot of reading about event bubbling but I am not sure whether I've not found the right information yet, or maybe I understand it correctly or possibly that event bubbling is leading me down the wrong path all together as I can't seem to take those concepts and apply them to this scenario.
so.....
given the following HTML structure:
<div class="btnMask">
<div class="button">
<a onclick="pageSubmit();return false;" href="#" id="addToBasket">
<span>Add to Basket</span>
</a>
</div>
</div>
where the div with class="btnMask" is added by my javascript.
Plus the following JQuery:
$('.btnMask').click(function() {
// prevent default actions and alert the customer to select something;
});
How do I go about stopping the tag firing when clicking the .btnMask div?
and (in case the answer to that does not make the answer to my other question obvious...)
How would I switch that on and off ? (I have a function that checks the drop-down onchange and sets the z-index to 99 / -99 so I would want to change this to incorporate this new method.)
Thank you in advance for your help.
<< EDIT >>
Using the initial answers to this I managed to solve the problems for links that take you away from the page using a regular href.
So I have now fixed the links where the HTML is like the following:
<div class="btnMask">
<div class="button">
<a id="nextPage" href="/link/toanotherpage.asp?id=667868465726122926234">
<span>Click to go to Page 2</span>
</a>
</div>
</div>
However, like I said there are many methods being used to take people away from the page and and e.preventDefault(); and e.stopPropagation(); don't work for my original example (presumably because they use an onclick rather than a href ?).
Is there a way to do the same thing as e.preventDefault(); and e.stopPropagation(); are doing on my .btnMask div but will also deal with contained links that are being trigged by an onclick?
thanks
<< EDIT >>
Updated the question title to reflect the exact issue rather than just event bubbling on regular links.

If you want to prevent event bubbling and cancel default action then you can return false from the event handler.
$('.btnMask').click(function() {
return false;
});
Or use preventDefault and stopPropagation
$('.btnMask').click(function(e) {
e.preventDefault();
e.stopPropagation();
});

$('.btnMask').click(function(e) {
e.stopPropagation();
});

Your onclick handler is fired before your jquery click handler. You can do something like this
function pageSubmit() {
alert('pageSubmit');
}
var link = document.getElementById('addToBasket');
var linkClickHandler = link.onclick;
link.onclick = null;
$('.button').data('linkClickHandler', linkClickHandler);
$('.button').on('click', function(e){
var clickHandler = $(this).data('linkClickHandler');
var link = $(this).find('a').get(0);
clickHandler.apply(link, [e]);
});
$('.btnMask').on('click', function(e){
if (!$(this).hasClass('test')) {
e.preventDefault();
e.stopPropagation();
}
});
and the html as
<div class="button">
<a onclick="pageSubmit();return false;" href="#" id="addToBasket">
<div class="btnMask test">
<span>Add to Basket</span>
</div>
</a>
</div>
If you remove the class test from btnMask div the pageSubmit handler will not be called,
and when it is present the handler is called.

How can I make entire DIV clickable AND open child links in separate DIV?

I asked a precursor to this question here:
Click link in DIV and show PHP/HTML in separate DIV
Then, after I removed the first script shown below, I was able to get the second script to work. I revised my question, but it appears to have gone silent. So I have a slightly modified question.
What is the conflict between the 2 scripts below and how can I modify them to work in tandem? Basically I want to be able to click anywhere in the DIV (".side_items") and have the child anchor links open in a separate DIV ("#main_content")
Javascript:
<script type="text/javascript">
$(document).ready(function(){
$(".side_items").click(function(){
window.location=$(this).find("a").attr("href");
return false;
})
});
</script>
<script type="text/javascript">
$(document).ready(function(){
$(".side_items a").click(function(e){
e.preventDefault();
$("#main_content").load($(this).attr("href"));
});
});
</script>
HTML: (slightly simplified)
<div id="main_content">
</div>
<div id="right_side">
<div class="side_items">
<a href="content.html">
<img src="images/examplethumb.png" /><br />
Content</a>
</div>
</div>
Both scripts work independently to achieve their individual desired result.

This will do it:
$(document).ready(function(){
$(".side_items").click(function(){
$("#main_content").load($(this).find("a").attr("href"));
return false;
})
});
Breaking it down:
$(".side_items").click(fn);
Find all the elements with a class of side_items and assign a click event handler (fn) to them. Each time one of these elements is clicked, fn is executed with the context of the element. In the discarded code you were using the selector .side_items a, which meant the click handler was only bound to the links inside the div, not the div itself.
$(this).find("a").attr("href")
Find all the links that are contained within the current element (this), and get the value of the href attribute from the first element found. In the discarded code the context (this) was a link. Since our handler is now bound to the containing div, the context is also the div. To get the link you have to find it.
$("#main_content").load(href);
Find the element with an id of main_content and load the content found at href into it. In the discarded code you were setting location.href, which causes the page to navigate away.

I think your issue is that you're trying to assign the $().ready(..) handler twice.
Try combing scripts like this
<script type="text/javascript">
var change_location = function(){
$(".side_items").click(function(){
window.location=$(this).find("a").attr("href");
return false;
});
}
var load_location = function(){
$(".side_items a").click(function(e){
e.preventDefault();
$("#main_content").load($(this).attr("href"));
});
}
$().ready(function(){
change_location();
load_function();
});
</script>
Hope that helps

jquery add and remove class problem

I'm trying to bind a function with a non-existent class. I will try to explain
my js:
function hidelink()
{
$('#user_form').hide();
$('.selected').text("New User").removeClass('selected').addClass('unselected');
return false;
}
function showlink()
{
$('#user_form').show();
$('.unselected').text("Hide it").removeClass('unselected').addClass('selected');
return false;
}
$(function(){
$('#user_form').hide();
$('.unselected').click(showlink);
$('.selected').click(hidelink);
});
my html:
<div id="user_form">
My Link
</div>
So basically, when you click in the link it will change the classes (selected/unselected) and hide/show a div. The problem is that, when i click once, it shows the form, but if i click again in the link, the form don't hides again. Maybe because i'm biding the events when the page loads and at this time there is not element that match the selector ".selected".. makes sense?

Maybe because i'm biding the events when the page loads and at this time there is not element that match the selector ".selected"..
Yes. Use live().