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Listen to objects click

I'm trying to listen to both "button" and "a" click, and then pass the value of the attribute "name" to a variable, I can't find what's wrong with my code:
$('a').click(function() {
var anchor;
anchor=$(this).attr('name');
$('#linkPressed').val(anchor);
});
$('button').click(function() {
var anchor;
anchor=$(this).attr('name');
$('#linkPressed').val(anchor);
});
Update: I have a PHP script that do something different according to the "linkPressed" value. Seemingly, this code is applicable also for <a> and <button> that don't have "name" attribute, which ruins my script. Is there a way to exclude the objects that don't have "name" attribute from the "click listener"?

To only select elements that have an attribute name, use the attribute selector:
$('a[name], button[name]').click(...);
// or
$('a, button').filter('[name]').click(...);

You can separate your selectors using comma ,. It's probably not working because you've initialize anchor variable two times:
$('a, button').click(function() {
var anchor;
anchor=$(this).attr('name');
$('#linkPressed').val(anchor);
});

You can bind the handler only to elements with name attributes:
$('a[name], button[name]').click(function() {
$('#linkPressed').val(this.name);
}

use multiple selector by the , at a one time it remove repetitive code
may be #linkPressed is a tag type not a input type at that time use text() at the palace of val()
$('a,button').click(function() {
var anchor;
anchor=$(this).attr('name');
$('#linkPressed').val(anchor);
});

I think this is it.
$("a, button").click(function() {
var anchor;
if($(this).attr("name") != undefined) {
anchor=$(this).attr('name');
$('#linkPressed').val(anchor);
}
});

jQuery - set data() variable from $(this).val()

I have an e-mail form on my website, with four fields. Three text inputs and a text area. Each field has a default value attribute which serves as its label. I would like these values to be automatically unset/reset on their element's focus and focusout events.
I have the following JavaScript/jQuery code, which creates this behaviour.
$('input,textarea').data('default', "bleh");
$('input,textarea').focus(function() {
if($(this).val() === $(this).data('default')) {
$(this).val('');
}
});
$('input,textarea').focusout(function() {
if ($(this).val() === '')
{
$(this).val($(this).data('default'));
}
});
My problem comes in the storing of the initial data('default') attribute. I had tried using .data('default', $(this).val())... but apparently that is illegal and $(this) is not recognized.
I have tried to find a clean jQuery way to iterate over each of the elements, but I can't seem to find one.
Is there an easy way, using jQuery, to achieve what I want?

Unless I'm mistaken, there's no reason to be setting data properties on the element, you can make use of the elements defaultValue property:
$('input, textarea').focus(function() {
if (this.value === this.defaultValue) {
this.value = '';
}
});
$('input, textarea').focusout(function() {
if (!$.trim(this.value).length) {
this.value = this.defaultValue;
}
});
Here's a fiddle

There is no this, because you're not in a callback. You'll have to iterate over each matched element, setting their default one at a time.
The "clean jQuery way" is simply with each:
$('input,textarea').each(function () {
$(this).data('default', $(this).val());
});

You need iterate through the input elements and then set the value to data using .each()
$('input,textarea').each(function(){
var $this = $(this);
$this.data('default', $this.val())
});

Confused with calling JQuery custom function

I have html like so
<span rel='comm' val='12'>click</span>
<span rel='comm' val='82'>click</span>
and I am using JQuery to do this
$('span[rel*=comm]').cust();
and the custom function is as such
$.fn.cust = function () {
$(this).click(function(e) {
alert($(this).val());
});
}
The value of this is 12 even when I click on 2nd span which should give me 82
Any help would be appreciated.

You'll need to return a seperate function for each element in the collection, normally done with return this.each ...
$.fn.cust = function () {
return this.each(function() {
$(this).click(function(e){
alert($(this).val());
});
});
}
And value is not a valid attribute for a span element.

This should work better:
$.fn.cust = function () {
$(this).click(function (e) {
alert($(this).attr('val'));
});
}
span does not have value.
http://jsfiddle.net/dREj6/
Also if you want to make your method chainable you should return an jQuery instance:
$.fn.cust = function () {
return $(this).click(function (e) {
alert($(this).attr('val'));
});
}
$('span[rel*=comm]').cust().css('color', 'red');
http://jsfiddle.net/dREj6/1/

rel are for links (anchor element) - use class
use data attribute instead of custom attributes
http://jsbin.com/ogenev/1/edit
<span class='comm' data-val='12'>click</span>
<span class='comm' data-val='82'>click</span>
$.fn.cust = function(){
$(this).click(function(){
alert(this.dataset.val);
});
};
$('.comm').cust();

It works if you use .attr('val')
$.fn.cust = function () {
$(this).click(function(e){
alert($(this).attr('val'));
});
}
$('span[rel*=comm]').cust();
http://jsfiddle.net/fW7FT/
.val() is for input since they're the only one accepting the val attribute officialy

The call $('span[rel*=comm]') returns a JQuery wrapper for all spans matching the selector - the two ones you have in your example are picked both.
Now inside the definition of cust, $(this) refers to the wrapped array, which causes your issue. Use
$(this).each( function() {
$(this).click (...
});
Inisde each $(this) will point to each separate span element in the selection, so they will have the click handler individually attached and working as you expect.

You can achieve what you're looking for with this:
HTML:
<span rel='comm' val='12'>click</span>
<span rel='comm' val='82'>click</span>
JS:
var cust = function(source) {
alert($(source).attr('val'));
}
$('span[rel*=comm]').click(function(e) {
cust(this);
});
The JSFiddle working: http://jsfiddle.net/ejquB/

If div is empty, remove it and change class of next div

Some generated output can be as follows:
<div class="fivecol"></div>
<div class="sevencol">content</div>
if the div.fivecol is empty, I want to remove it and change the div.sevencol to a div.twelvecol
$('.fivecol').each(function() {
if ($(this).html() ==''){
$(this).remove().next('sevencol').removeClass('sevencol').addClass('twelvecol');
}
});
doesn't do the trick. Any ideas?

$('.fivecol:empty + .sevencol').toggleClass('sevencol twelvecol')
.prev()
.remove();
DEMO: http://jsfiddle.net/JY9NN/

$('.fivecol').each(function(i, div) {
if (!div.html().trim()) {
div.remove().next('sevencol').removeClass('sevencol').addClass('twelvecol');
}
});
basically I just fixed some syntax errors, and changed the this reference to the proper argument call. Let me know how that works.
Best,
-Brian

Try this,
$(function () {
$('.fivecol').each(function() {
if ($(this).html() =='') {
$(this).remove();
$('.sevencol').each(function(){
$(this).attr('class','twelvecol');
});
}
});
});

We could use a couple fancy selector tricks:
$(".fivecol:empty + .sevencol").attr("class", function(){
return $(this).prev().remove(), "twelvecol";
});
As you can probably guess, .fivecol:empty attempts to find an empty element with the class fivecol. It then proceeds to grab the sibling element, using +, which has the class .sevencol.
Once we have our .sevencol element, we set out to change its class value to twelvecol. Since we're in this function, we know that .fivecol:empty was found, so we can safely remove it. Lastly, we simply return the new class value to be assigned in the place of sevencol.
Demo: http://jsfiddle.net/cLcVh/1/

Javascript , jQuery - what have I done wrong?

$(document).ready(function () {
$("href").attr('href', 'title');
});
$('a[href$=.jpg]').each(function () {
var imageSrc = $(this).attr('href');
var img = $('<img />').attr('src', imageSrc).css('max-width', '300px').css('max-height', '200px').css('marginBottom', '10px').css('marginTop', '10px').attr('rel', 'lightbox');
$(this).replaceWith(img);
});
});
This is the jQuery code I have at the moment, which I want to change all links' href to the same as their title, before then embedding them in the page. Yet with the changing href to title bit in the code, it stops working. I'm new to Javascript so am definitely doing something wrong, just not sure what yet! Any help much appreciated!
Thank you guys
EDIT
This is the html that I want to change:
<p class="entry-content">Some interesting contenthttp://example.com/index.php/attachment/11</p>

You are changing it wrong, you are trying to select href elements instead of a.
This fix should do it:
$("a[title]").each(function() {
$(this).attr('href',$(this).attr('title'));
});
It will select all a elements with title and set the href with this value.

Here's a much more efficient way.
Since you're just replacing the <a> elements, there's really no need to change its href. Just select the <a> elements that end with jpg/jpeg, and use that attribute directly.
Example: http://jsfiddle.net/5ZBVf/4/
$(document).ready(function() {
$("a[title$=.jpg],[title$=.jpeg]").replaceWith(function() {
return $('<img />', {src:this.title, rel:'lightbox'})
.css({maxWidth: 300,maxHeight: 200,marginBottom: 10,marginTop: 10});
});
});​
Your .each() is outside the .ready() function.
You can accomplish the href change easily like this:
$(document).ready(function () {
$("a").attr('href', function() { return this.title; });
});
The .attr() method will accept a function where the return value is the new value of (in this case) href.
So the whole thing could look like this:
Example: http://jsfiddle.net/5ZBVf/3/
$(document).ready(function() {
$("a[title]").attr('href', function() { return this.title; })
.filter('[href$=.jpg],[href$=.jpeg]')
.replaceWith(function() {
return $('<img />', {src:this.href, rel:'lightbox'})
.css({maxWidth: 300,maxHeight: 200,marginBottom: 10,marginTop: 10});
});
});

This line:
$("href").attr('href','title');
Is finding all href elements and replacing their href attr with the string 'title'. Since there is no such thing as an href element, Try this instead:
// for every anchor element on the page, replace it's href attribute with it's title attribute
$('a').each(function() {
$(this).attr('href', $(this).attr('title');
});

Check this out: http://jsfiddle.net/TbMzD/ Seems to do what you want.
Note: $(document).ready() is commented because of jsfiddle, you actually need it in your code.

Try:
$("a").each(function () {
var $this = $(this);
$this.attr('href', $this.attr('title'));
});