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Jquery Mobile opacity doesn't work :(

How to make this button pulsate on jQuery mobile?
Are there problems with jQuery mobile because in my main application on some divs I can apply this pulsating effect and on other they just flicker, or fade in and out with interruptions or it jerky fades in and out.
html:
<button id="pulsate">I want to pulsate!</button>
JS:
$('#pulsate').on('click', function () {
pulsate("#pulsate");
});
function pulsate(element) {
$(element || this).animate({ opacity: 0 }, 500, function() {
$(this).animate({ opacity: 1 }, 500, pulsate); });
}
http://jsfiddle.net/alecstheone/zCUSK/
I only use jquery and jquerymobile... I noticed that if I disable jquerymobile in jsfiddle it works but I dont want this as I use jquerymobile in my application for other things...

Your code works fine but you've to make some changes to your script, As you're having a click event on the button but using jQuery mobile your button is wrapped around with span and divs(mainly because of jquery mobile css),
So you just have to traverse through that target div with .closest() to set your animation effect. Below is the small demo of your code with the desired effects.
$('#pulsate').on('click', function () {
pulsate(this); // Change here
});
function pulsate(element) {
$(element || this).closest("div.ui-btn").animate({
opacity: 0
}, 500, function () {
$(this).closest("div.ui-btn").animate({
opacity: 1
}, 500, pulsate);
});
}
Fiddle Example

Expanding content areas using jQuery animate function

I'm using the animate function in jQuery to re-size a content area when the user hovers over the element.
The script works fine but I cant work out how to stop the script from resizing more than once if the element is hovered over more than once.
I have created a jsfiddle here I have also added the js I used.
var minheight = $('.section-fade').css("height");
$('.section-fade').hover(
function () {
$(this).animate({
height: $('.childsection').height()
}, 1000);
},
function () {
$(this).animate({
height: minheight
}, 1000);
});
Any ideas would be very much welcomed.
Cheers

What you're looking for is .stop().
.stop() will cancel all animations on an object.
http://jsfiddle.net/zxm9S/1/
var minheight = $('.section-fade').css("height");
$('.section-fade').hover(
function () {
$(this).stop().animate({
height: $('.childsection').height()
}, 1000);
},
function () {
$(this).stop().animate({
height: minheight
}, 1000);
});

How to add Javascript into a component without disabling other script?

I use Swatch template by woothemes. I have modified the logo component, and I want to add this following script to my logo. I copied this script in the header.php.
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
$(function coba() {
// set opacity to nill on page load
$("#logo a span").css("opacity","0");
// on mouse over
$("#logo a span").hover(function () {
// animate opacity to full
$(this).stop().animate({
opacity: 1
}, 'slow');
},
// on mouse out
function coba() {
// animate opacity to nill
$(this).stop().animate({
opacity: 0
}, 'slow');
});
});
</script>
but, when I run it, the other script was disabled. All of them, js for slider,prettyphoto,comments,etc. How can I activate all off them at once? Thanks

Looks like you could have an issue with a recursive call tying up your browser thread ina busy loop. The following code works but without requiring a recursive call.
<script type="text/javascript">
$(document).ready(function() {
// set opacity to nill on page load
$("#logo a span").css("opacity","0");
$("#logo a span").hover(
function () {
// on mouse over
$(this).stop().animate({
opacity: 1
}, 'slow');
},
function () {
// on mouse out
$(this).stop().animate({
opacity: 0
}, 'slow');
});
});
</script>

Using hover and click with jQuery UI tabs?

I am using the following code for my jQuery UI tabs:
$('#tabs').tabs({
fx: { opacity: 'toggle', duration: 400 }}).tabs('rotate', 1000);
$("#tabs").hover(function() {
$("#tabs").tabs("rotate",0);
},
function() {
$("#tabs").tabs("rotate",1000);
});
$("#tabs").click(function() {
$("#tabs").tabs('rotate', 0);
});
The tabs are rotating properly and the rotation stop when hovering with the mouse. However, the 'hover' function is also overriding the 'click' function. How can I achieve a pause when hovering, and a complete stop to the rotation on click?

Try this
$('#tabs').tabs({
fx: { opacity: 'toggle', duration: 400 }
}).tabs('rotate', 1000);
$("#tabs").hover(
function() {
$("#tabs").stop();
},
function() {
$("#tabs").tabs("rotate",1000);
}
);
$("#tabs").click(
function() {
$("#tabs").stop(true);
}
);

just a week ago i looked for the same issue. Now i created an extesion: Pause on Hover for jQuery UI Tabs Rotate

jQuery Animation Delay

I'm working on a small bit of functionality for three similar tabbed items. Basically, when you hover over one, I want the opacity of the two siblings to go to 50%. I set up a pretty basic jQuery hover event, here's the page code...
<div id="footer">
Seek
Experience
Gain
</div>
...and the corresponding JS:
$('.footer-tabs').hover(
function () {
$(this).siblings().animate({ opacity: .5 },500);
},
function () {
$(this).siblings().animate({ opacity: 1 },500);
}
);
When you hover onto one everything works great, but when you hover from one to the other the siblings don't dim simultaneously. I did a quick screencast for reference. I'm sure there's a simple way to make it work properly, but I'm at a loss for it. Thanks in advance.
Screencast: http://dl.dropbox.com/u/1762184/example.mp4

You want to cancel any in process animations on the siblings. This is what the stop() function is for.
$('.footer-tabs').hover(
function () {
$(this).siblings().stop().animate({ opacity: .5 },500);
},
function () {
$(this).siblings().stop().animate({ opacity: 1 },500);
}
);

Try this :
$('.footer-tabs').hover(
function () {
$(this).siblings().animate({ opacity: .5 },"fast");
},
function () {
$(this).siblings().animate({ opacity: 1 },"fast");
}
);