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Change background images using setTimeout

I have 31 images and I want to display them one after another as the background of a div. I only want it to change when the user hovers over the div. My problem right now is that it just flips through all the images really fast. I am attempting to use setTimeout, but it isn't working. How can I make the delay work?
The name of the div is About_Me_Block and the images are called frame1.gif,frame2.gif ...etc
Here is my code:
function changeImg(counter) {
$('#About_Me_Block').attr("style", "background-image: url(playGif/frame" + counter + ".gif);");
}
$(document).ready(function() {
var hoverAnimate = []
"use strict";
$('#About_Me_Block').mouseenter(function() {
hoverAnimate[0] = true;
var counter = 0;
while (hoverAnimate[0]) {
console.log(counter);
setTimeout(changeImg(counter), 1000);
counter++;
if (counter === 32)
hoverAnimate[0] = false;
}
});
$('#About_Me_Block').mouseleave(function() {
hoverAnimate[0] = false;
$(this).attr("style", "background-image: url(play.jpeg);");
});
});

setTimeout doesn't wait for the function to end, it works lile threading in other languages.
To achieve a what you want, you need to call setTimeout from the changeImg function.
var counter = 0;
$(document).ready(function() {
var hoverAnimate = []
"use strict";
$('#About_Me_Block').mouseenter(function() {
hoverAnimate[0] = true;
counter = 0;
changeImg();
});
$('#About_Me_Block').mouseleave(function() {
hoverAnimate[0] = false;
$(this).attr("style", "background-image: url(play.jpeg);");
});
});
function changeImg() {
$('#About_Me_Block').attr("style", "background-image: url(playGif/frame" + counter + ".gif);");
counter++;
if (counter < 32 && hoverAnimate[0]) {
setTimeout(changeImg, 1000);
} else {
hoverAnimate[0] = false;
}
}

the reason they happen all at once is because while statement doesn't have delay, so all setTimeout will be set up at the same time, thus, calling changeImg all at once.
To solve this problem, you can replace setTimeout with setInterval. Instead of using while, you can just call setInterval like
var counter = 0;
var myTimer = setInterval(changeImg, 1000);
and update counter inside changeImg every time it gets called. After looping, don't forget to
clearInterval(myTimer)

It seems you need to read up on how setTimeout works. It essentially places a reminder to run a function after a given amount of milliseconds have passed. So, when you do setTimeout(changImg(counter), 1000) you are calling changImg(counter) which returns undefined. Therein producing this setTimeout(undefined, 1000) which is why it flips really fast.
So, you can use bind to allow the function to be called later with that parameter built in. Also, make sure you remove the reminders once done with clearTimeout.
function changeImg(counter) {
$('#About_Me_Block').attr("style", "background-image: url(playGif/frame" + counter + ".gif);");
}
$(document).ready(function() {
var hoverAnimate = false, id;
function loop(counter) {
if(hoverAnimate || counter < 32) {
changeImg(counter);
id = setTimeout(loop.bind(this, counter++), 1000);
}
}
$('#About_Me_Block').mouseenter(function() {
hoverAnimate = true;
id = setTimeout(loop.bind(this, 0), 1000);
});
$('#About_Me_Block').mouseleave(function() {
hoverAnimate = false;
// Don't want a reminder for a random counter to wake up.
clearTimeout(id);
$(this).attr("style", "background-image: url(play.jpeg);");
});
});

Two methods for timers - setTimeout and SetInterval (single / repeating)
// setInterval is also in milliseconds
var intervalHandle = setInterval(<yourFuncToChangeImage>,5000);
//this handle loop and make example loop stop
yourelement.yourEvent = function() {
clearInterval(intervalHandle);
};

How to run a function once after element has been found with Jquery/Javascript

Is there a way I can run a function once after a specific element has been found?
I tried this:
setInterval(function () {
if ($('.imagewrapper').length) {
self.carousel();
}
}, 1000)
So, it checks my page continiously if the .imagewrapper element exisit, and if so, it should run the self.carousel()function. The problem is, that this way, as soon the element exists, it runs the function continiously. Is there a way around?
ps: The setInterval-method needs to be there.

Try:
(function delay() {
if ($('.imagewrapper').length) {
self.carousel();
} else {
setTimeout(delay, 1000);
}
})();
or if you need setInterval:
var interval = setInterval(function() {
if ($('.imagewrapper').length) {
self.carousel();
clearInterval(interval);
}
}, 1000);

You looking for waitUntilExists https://gist.github.com/buu700/4200601
So, it will works something like that:
$(someselect).waitUntilExists(function(){
var that = $(this);
// do some code
})

It's easy:
// set ran to false when you load the page
ran = false;
setInterval(function () {
// only do your stuff when you haven't do yet (ran==false)
if (!ran && $('.imagewrapper').length) {
self.carousel();
// when you did it for the 1st time set ran to true, so next time you don't enter the if.
ran = true;
} }, 1000)
// but even better to stop the timer after you entered the if for the 1st time:
timer = setInterval(function () {
// only do your stuff when you haven't do yet (ran==false)
if ($('.imagewrapper').length) {
self.carousel();
// when you did it for the 1st time delete the timer
clearInterval(timer);
} }, 1000)

Simulating Spinner Number with mousedown

I made a control (numeric spinner up and down), to work in a table:
JSFIDDLE: http://jsfiddle.net/Leandro1981/wn8vd/1/
and I want simulate the "mousedown, increment while mouse button is helding" but I can't do it. I tried to mix it with the following and functional script:
JSFIDDLE: http://jsfiddle.net/Leandro1981/kKW85/
but I couldn't make it.
My last attempt here:
http://jsfiddle.net/Leandro1981/S8Zt9/1/
Maybe the wrong is the
timeout = setInterval(function () {
But I couldn't figure out. I'm using bootstrap 3, so I can't use some JQuery UI plugins...
Any help will be preciated!
Please comment below if you have any question, comment or anything to improve this question, and sorry for my english :)
Please be free to use my code/control in any way.
Thanks and kind regards

Write a factory to set up each control so you get a closure over the variables, now it's just a matter of being able to make it work given the relevant elements. For this, you'll need to
Listen for mousedown on the up and down nodes to set off the changes
Start a timeout loop to keep doing your change
Listen for mouseup on window to ensure you cancel the timeout loop (you may also want to listen for mouseout/loss of focus)
So all together,
function spinFactory(node, up, down) { // I wrote this vanilla :D
var spinning, delta;
window.addEventListener('mouseup', stopSpin);
function spin() {
node.value = +node.value + delta;
spinning = setTimeout(spin, 500);
}
function stopSpin() { // maybe also invoke this on mouseout/loss of focus
window.clearTimeout(spinning);
delta = 0;
}
up.addEventListener('mousedown', function spinUp() {
delta = 1;
spin();
});
down.addEventListener('mousedown', function spinDown() {
delta = -1;
spin();
});
}
// apply to your control, used a bit of jQuery to make life easier
$('.PNET-spinner').each(function () {
spinFactory(
this.getElementsByTagName('input')[0],
$(this).find('.btn:first-of-type')[0],
$(this).find('.btn:last-of-type')[0]
);
});
DEMO

I have updated the Fiddle here ... Please check this and it might helps you..
Script
$('.PNET-spinner .btn:first-of-type').on('mousedown', function (e) {
var timer, proxy = this;
timer = setInterval(function () {
increment(proxy);
}, 200);
$(document).one("mouseup", function () {
increment(proxy);
if (timer) clearInterval(timer);
});
});
$('.PNET-spinner .btn:last-of-type').on('mousedown', function () {
var timer, proxy = this;
timer = setInterval(function () {
decrement(proxy);
}, 200);
$(document).one("mouseup", function () {
decrement(proxy);
if (timer) clearInterval(timer);
});
});
function increment(proxy) {
var numupdown = $('.PNET-spinner input', $(proxy).closest("tr"));
var inputValue = parseInt($(numupdown).val(), 10);
inputValue++;
$(numupdown).val(inputValue);
}
function decrement(proxy) {
var numupdown = $('.PNET-spinner input', $(proxy).closest("tr"));
var inputValue = parseInt($(numupdown).val(), 10);
if (inputValue > 1) {
inputValue--;
$(numupdown).val(inputValue);
}
}

You simply need to take care of two things. First, your function to increment and decrement the value in the textbox should be called again and again till user do mouseout or mouseup. Second, make surethis has the right value in var numupdown = $('.PNET-spinner input', $(this).closest("tr"));
Following code shows how to do it for the increment button. Similar thing, you can implement for decrement button.
var timeout;
var inc = function () {
var myThis = this;
var numupdown = $('.PNET-spinner input', $(this).closest("tr"));
var inputValue = parseInt($(numupdown).val(), 10);
inputValue++;
console.log(inputValue);
$(numupdown).val(inputValue);
clearTimeout(timeout);
timeout = setTimeout(function(){
//http://stackoverflow.com/questions/3630054/how-do-i-pass-the-this-context-to-a-function
inc.apply(myThis, arguments);
}, 1000);
};
var incStop = function(){
clearTimeout(timeout);
}
$('.PNET-spinner .btn:first-of-type').on('mousedown', inc);
$('.PNET-spinner .btn:first-of-type').on('mouseup', incStop);
$('.PNET-spinner .btn:first-of-type').on('mouseout', incStop);
Check this DEMO here.

javascript - recursive function & setTimeout

I am trying to write a javascript function that when called performs function DoSomething() once,
but can be triggered to perform the function repeatedly until triggered to stop.
I am using setTimeout() function. I am not sure if this is best method from performance and memory point of view.
Also I would like to avoid global variable if possible
<!DOCTYPE html>
<html>
<script src="jquery.js"></script>
<script>
var globalCheckInventory = false;
$(document).ready(function(){
// start checking inventory
globalCheckInventory = true;
myTimerFunction();
});
// check inventory at regular intervals, until condition is met in DoSomething
function myTimerFunction(){
DoSomething();
if (globalCheckInventory == true)
{
setTimeout(myTimerFunction, 5000);
}
}
// when condition is met stop checking inventory
function DoSomething() {
alert("got here 1 ");
var condition = 1;
var state = 2 ;
if (condition == state)
{
globalCheckInventory = false;
}
}
</script>

This is probably the easier way to do what you're describing:
$(function () {
var myChecker = setInterval(function () {
if (breakCondition) {
clearInterval(myChecker);
} else {
doSomething();
}
}, 500);
});

Another way to do it would be the store the timer ID and use setInterval and clearInterval
var timer = setInterval(DoSomething);
function DoSomething() {
if (condition)
clearInterval(timer);
}

I see nothing wrong with your implementation other than the pollution of the global namespace. You can use a closure (self-executing function) to limit the scope of your variables like this:
(function(){
var checkInventory = false, inventoryTimer;
function myTimerFunction() { /* ... */ }
function doSomething() { /* ... */ }
$(document).ready(function(){
checkInventory = true;
/* save handle to timer so you can cancel or reset the timer if necessary */
inventoryTimer = setTimeout(myTimerFunction, 5000);
});
})();

Encapsulate it:
function caller(delegate, persist){
delegate();
if(persist){
var timer = setInterval(delegate, 300);
return {
kill: function(){
clearInterval(timer);
}
}
}
}
var foo = function(){
console.log('foo');
}
var _caller = caller(foo, true);
//to stop: _caller.kill()

Implement a timer into js function

I have already this function I'm trying to add a timer like this: when value >= 1 and user doesn't move mouse for 1 minute or 60 seconds timer starts and redirect user to a new page but if user moves mouse before 60 seconds end the timer resets again.
function pagar(){
var textarea = document.getElementById ("textarea");
/*if (event.propertyName.toLowerCase () == "value") {
alert ("NUEVO VALOR EN EL CAMPO TOTAL: " + event.srcElement.value);
}*/
if (event.srcElement.value>=1)
{
var bottomMenu = $("#main_footer").bottomMenu([
{name:"backward","class":"red", text:getStr("menu_backward")},
{name:"menu","class":"green", text:getStr("menu_menu"), func:function(){parent.location = "./index.html";}, enabled:false},
{name:"forward","class":"green", text:getStr("menu_pay"), func:forward, enabled:true}
]);
}
else
{
var bottomMenu = $("#main_footer").bottomMenu([
{name:"backward","class":"red", text:getStr("menu_backward")},
{name:"menu","class":"green", text:getStr("menu_menu"), func:function() {parent.location = "./index.html";}, enabled:true},
{name:"forward","class":"green", text:getStr("menu_pay"), func:forward, enabled:false}
]);
}
}
I want to add a timer after this:
if (event.srcElement.value>=1)
{

You'll want to attach a mousemove event listener to the window which clears and resets a timer upon movement.
function MouseMoveTimeout() {
// Whatever you want the timeout to do
}
var TimerID;
function InstallMouseMoveTimeout(Install) {
var Timeout = 60000;
var MouseMoveDetector = function(e) {
clearTimeout(TimerID);
TimerID = setTimeout(MouseMoveTimeout, Timeout);
}
if(Install && TimerID == undefined) {
TimerID = setTimeout(MouseMoveTimeout, Timeout);
window.addEventListener('mousemove', MouseMoveDetector, true);
} else {
clearTimeout(TimerID);
window.removeEventListener('mousemove', MouseMoveDetector, true);
TimerID = undefined;
}
}
To use this in your code you would:
if (event.srcElement.value>=1) {
InstallMouseMoveTimeout(true); // Install mouse move timeout
...
} else {
InstallMouseMoveTimeout(false); // Cancel mouse move timeout
...
}

var idleTimer = null; // do this in the global scope
// do the following at the location where you want to reset the timer:
if(idleTimer) window.clearTimeout(idleTimer);
idleTimer = window.setTimeout(function() {
location.href = 'other-site';
}, 60000);
So whenever the second block of code is called the old timer is reset and a new one is started. However, since mousemove events trigger very often, this might screw up performance. In this case create an interval (setInterval()) which triggers e.g. every 10 seconds and only set the current date in your mousemove handler. Then you can simply check in your timer callback if enough time since the last mousemove has exceeded and in this case execute an action.

Sounds like a crazy UI idea! But if you want to do that, you need to declare this somewhere:
var timer;
When you want to start the timer running, do this:
timer = setTimeout(function() { timer = -1; doStuff(); }, seconds * 1000);
That will call doStuff after seconds has elapsed.
If you want to cancel the timer:
if (timer != -1) {
clearTimeout(timer);
timer = -1;
}
By combining these appropriately, you can solve your problem.