Develop Reference

How to use multiple handlers in jquery function

I have some code I am working on and I cannot seem to figure out the terms to search for assistance.
I am trying to add a jquery statement that executes when the #quickSearchResults_section is clicked "AND" when #nav-input is focused out.
So in a nutshell, I am still learning jquery and programming logic and want to use click function and focusout.
<script>
$(":not(#quickSearchResults_section)").click(function(){
$("#quickSearchResults_section").hide();
});
</script>

Try something like this:
$("#nav-input").on("blur", function(){
$("#quickSearchResults_section").click(function(){
$("#quickSearchResults_section").hide();
});
});

Cant select ids that I loaded with jQuery

I understand that you need to use ".on" to use code that you loaded with jquery after the page has loaded. (At least I think it works that way)
So I tried that but it somehow just doesn't do a thing at all. No errors in the console either.
$("#forgot_password").click(function(){
var forgot_password = '<div id="toLogin" style="cursor:pointer;">Prijava</div>'
$("#loginPopupForm").html(forgot_password);
});
$("#toLogin").on("click", function(){
alert("Hello");
});
So when I click on #forgot_password it does execute the first click function. But when I click on #toLogin it doesn't do anything and I think its because its loaded with jquery when I click on #forgot_password

Try this
$("#loginPopupForm").on("click", "#toLogin", function(){
alert("Hello");
});

You need to bind to an element that is present when the page loads, like body for example. Just change your code to what is shown below
$("body").on("click", "#forgot_password", function(){
var forgot_password = '<div id="toLogin" style="cursor:pointer;">Prijava</div>'
$("#loginPopupForm").html(forgot_password);
});
$("body").on("click", "#toLogin", function(){
alert("Hello");
});

You are setting the on to the wrong thing. You want it to be:
$(document).on('click', '#toLogin', function() {alert('hello') });
The id isn't there until you do the other click event, so jQuery is not finding any element to set the click event on. You need to have an element that has been rendered in the DOM to set the event on.

You are totally right about the problem : on() targets only elements that are already existing as it runs.
What you need in jQuery is called Delegated event and is well explained on the Jquery doc page.
The difference in the code is thin, but it's how you're supposed to do.

You have to specify the parent element
$("#toLogin").on("click","#loginPopupForm", function(){
alert("Hello");
});
in the 2nd argument of the on

jQuery hover firing without mouse over

I have an element with id=message1mark. The following code will run the two alerts when the page loads regardless of the position on the mouse. Any help would be appreciated.
<script type="text/javascript">
jQuery(document).ready(function(){
jQuery("#message1mark").hover(alert("on"), alert("off"));
});
</script>

You need to wrap those alerts in functions:
$(document).ready(function(){
$("#message1mark").hover(function(){alert("on");}, function(){alert("off");});
});
Working example: http://jsfiddle.net/eJzKr/

What you tried would be interpreted as
try to call a function (which is why alert() is executed at the time of binding
and bind its result as a handler (which is nothing in this case)
$("#message1mark").hover(function(){
alert("on")
}, function(){
alert("off")
});
});

The correct way is:
jQuery("#message1mark").hover(function() {
alert("on");
},
function() {
alert("off"))
};
});

I believe that the alert() function fires automatically on each page. So even though you've tried to make it dependent on the hover function, it doesn't care.
It sounds like what you want is fundamentally a tooltip functionality. Some of the techniques listed in these resources might be a better way to approach things.
http://jquery.bassistance.de/tooltip/demo/
http://www.roseindia.net/tutorial/jquery/PopupOnHover.html

Instead of writing in two different functions you can include in one function itself. Below is the code for reference.
$(document).ready(function(){
$("#message1mark").hover(function(){alert("on");alert("off");});
});

jQuery select all elements with a common class

I want to handle a click event across a set of links so tried to approach this by adding a secondary class like following:
Test 1
Test 2
Test 3
Don't handle this one
Then tried this jquery selector to select the "external" class on links:
$('a.external').click(function(e) {
do something here...
});
However this isn't working like I expected. What's the right way to handle this? Should I just use a wildcard selector like the following or is there a better way?
$('[class^="someclass"]').click(function(e) {
....
});

What you have is exactly right (though the e probably isn't necessary in function(e) in your case).
Test 1
Test 2
Test 3
Don't handle this one
<script>
$('a.external').click(function(e) {
// will print the href in a javascript alert box
alert( $(this).attr('href') );
});
</script>
As far as I can tell the only possibility is that your <script> is actually above your <a> tags -- your script can't add the click listeners to the anchors because they wouldn't exist yet.
If so, you'll need to wrap the javascript in $(document).ready( function(){ /* code here */ });
Also, no need for the external class, just use the "select all absolute anchors, but not the ones linking to my domain" selector: $('a[href^="http://"]').not('[href^="http://mydomain.com"]')

I'm going to guess that your issue is that clicking the links actually makes it navigate somewhere? You need to tell the browser to ignore the normal link behavior. Otherwise your click function will run and then it will immediately navigate to the 'href' url. Also make sure this is all wrapped in a ready function.
$(function() {
$('a.external').click(function(e) {
// Do whatever
e.preventDefault();
});
});

I tried it out in jsFiddle and it works.
You have an extra parenthesis on the click() function.
Notice have your function(e) you have close parenthesis, remove that.
You should end up with this:
$('a.external').click(function(e) {
do something here...
});

try : http://jsfiddle.net/n6JJ3/
$('a.external').click(function() {
jQuery(this).css('background','red');
});​

jQuery Class selector not working

I'm struggling to make an alert come up when an anchor tag with a specific class is clicked inside of a div.
My html section in question looks like this...
<div id="foo">
<a class='bar' href='#'>Next</a>
</div>
The jQuery section is as follows..
$('.bar').click(function()
{
alert("CLICKED");
});
My problem is that I cannot get this alert to come up, I think that I'm properly selecting the class "next", but it won't pick it up for some reason. I've also tried almost everything on this page but nothing is working. If I don't try to specify the anchor tag i.e. $('#foo').click(function()... then it works, but there will be multiple anchor tags within this div, so simply having the alert executed when the div is clicked won't work for what I need. The website this is on is a search engine using ajax to send information to do_search.php. Within the do_search.php I make pagination decisions based on how many results are found, and if applicable, a next, previous, last, and first link may be made and echoed.
EDIT: I just figured it out, it was my placement of the .next function, since it wasn't created on the initial document load but instead after a result had been returned, I moved the .next function to the success part of the ajax function since that is where the buttons will be created if they need to be, now it works.

Try using the live() command:
$(".bar").live("click", function(){ alert(); });
Because you load your button via AJAX, the click event isn't binded to it. If you use the live() command, it will automatically bind events to all elements created after the page has loaded.
More details, here

.live is now deprecated and is the selected answer for this. The answer is in the comments in the selected answer above. Here is the solution that resolved it for me:
$(document).on('click','.bar', function() { alert(); });
Thanks to #Blazemonger for the fix.

You surely missed $(document).ready(). Your code should be:
$(document).ready(function(){
$('.bar').click(function()
{
alert("CLICKED");
});
});
Hope this helps. Cheers

Make sure you have included JQuery Library properly.
Make sure your script has written between $(document).ready() in short $(function(){ });
Demo : http://jsfiddle.net/W9PXG/1/
<div id="foo">
<a class='bar' href='#'>Next</a>
</div>
$(function(){
$('a.bar').click(function()
{
alert("CLICKED");
});
});