Develop Reference

redirect form after submit

I created a submit form with JS simply to post a variable to PHP:
entry.innerHTML= ' <form action="eLoad.php" method="post"> <input class="submitLink" type="submit" name="name" value='+uploaded[i][1]+'> </form>
It works but in my php i want to send back a variable to JS. I'm using Json but every time I submit, the form submits to my browser and ouputs the php file and echos whatever JS text I have on the browser. I want to redirect to another page after the php and the JS (json) in my php loads.
Any help? Thanks

Sounds like sending an AJAX request and redirecting on the callback function is what you need.
As suggested here, I also strongly recommend using an existing library.
To use jQuery for example, you'll first have to include it by adding:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" type="text/javascript"></script>
Once you've done that and can use the library, try something like this:
$.ajax({
url: "eLoad.php"
}).done(function() {
window.location = <url-to-redirect-to>;
});
One last thing to mention, there are many useful params you can use when calling the jQuery's ajax function, take a look at http://api.jquery.com/jQuery.ajax/

What you are looking here is for async submition of forms, otherwise known as AJAX.
I suggest you adopt an existing library to do the boring part for you.

Visit this Lightweight JS AJAX library , you will need to use ajax as suggested, implementing and using jQuery will be the fastest way, but do go for other options like zepto.js, mootools, etc. Also if you want to build your own solution for your problems do a little research on xmlhttp, refer to this link https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest
You wont have to write a lot of code to do this, but using readily available libraries wont hurt.

I recommend an AJAX solution. Take a look at the JQuery JavaScript library at http://api.jquery.com/jQuery.ajax/. With AJAX you can load content (and post forms) dynamicly into your webpage without refreshing the page.
Edit: Example code:
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).on('submit', 'form#my-form', function() {
$.ajax({
type: "post",
data: $(this).serialize(),
url: "my_page.php",
success: function(response) {
alert(response);
}
});
});
</script>

How to realize screens / views with JavaScript / Jquery easily?

I'm sure I'm missing something pretty basic, but I have just started to get myself up to speed on jQuery and Javascript programming. Previously I was doing server side programming with PHP.
I'm now in the middle of creating a prototype for HTML5 webapp, where I would like to have different screens. Now with PHP that was pretty easy, I could just used server side templates like Smarty and be done with it.
However to make my app more webapp like, I would like to dynamically change between screens without having to reload the window.
I have looked into several options that might be anwsers to my question, but I'm not sure whether I'm on the right track.
I have checked for example JsRender, JsViews or even the pure jquery load command.
But what I'm not sure is whether these things would allow me to have something like this:
HEADER_PART
MAIN_CONTENT
FOOTER_PART (also contains links to common JS files that I use)
I would like to dynamically update the MAIN_CONTENT part. Currently my application is only one page, and all my custom logic that belongs to that page is in one JS file. In this JS file, I use a simple $(function() { ... to load my page, so whenever it gets loaded, parts of my page get updated asyncronously. This is fine, since all my blocks in this certain page would have to be loaded when that one page gets loaded.
But what if I have a link, like main.html#otherscreen, and when I click that screen, I would like to change my MAIN_CONTENT and also run another page load specific JS that handles blocks on that other screen, not the first page?
I know I could still use probably server side templating and load my pages using AJAX requrests, but again, not sure whether that is the right approach.
Could you please enlighten me? :)
Thanks & best regards,
Bence

Check out jQuery.load(). Using this function you can dynamically load content into a div on the page, which is what I think you want to do. Just find the div on the page you want to load content into and call
$('#mydiv').load(url, data, function(response){
//do something once it's done.
});
Per your comments...
This is actually very easy. .load() should replace the content in the div (I think. If not, just call .empty() first). Of course you could get fancy and add effects, like
function changePages(url) {
$('#mydiv').fadeOut('fast', function() {
$(this).load(url, function(response){
$('#mydiv').fadeIn('fast');
});
});
}
To handle things like the hash in the URL, in your click event you have to make sure you first call e.preventDefault():
$('#mylink').click(function(e){
e.preventDefault(); //e is a jquery event object
var link = $(this);
var hash = link.attr('href'); // get the hashtag if the href is '#something'
changePages(someUrl + hash);
});

For dynamic loading of data into the page without changing your header and footer you should use jQuery's AJAX function. It allows you to post requests to the server and receive data back without reloading the page. A simple example would be something like:
<html>
<head>
<title>Example</title>
<!-- Assuming jQuery is already referenced -->
<script type="text/javascript">
$('span.buttonish').click(function(){
$.ajax({
// The URL can be a file or a PHP script of your choosing
// it can also be pure HTML without the <html> tags as they
// are already in your file
url: 'path/to/the/file/that/return/data',
success: function(receivedData) {
// The received data is the content of the file or the return
// data of the script and you can use it as you would with any data
$('#content').html(receivedData);
}
});
});
</script>
</head>
<body>
<div id="header">
<!-- Something -->
</div>
<div id="content">
<span class="buttonish">Click me to change the text... </span>
</div>
</div id="footer">
<!-- Something -->
</div>
</body>
<html>

jQuery hide form on submit?

I have a form setup where a user can register, and on submittal, a PHP script runs which validates the user, and once that is done, it echoes a messagebox which jQuery quickly hides and then fades in over the course of 1 second. What I now want to do is to be able to hide that form on submittal, and I thought this might do it:
$(document).ready(function() {
$('div.mainsuccess,div.mainerror').hide(0).fadeIn(1000);
$('form.register').submit(function() {
$(this).hide(1000);
});
});
Where div.mainsuccess is the success message, and form.register is the form (with a class of register). Now the first line works, which tells me the script is being called, but the form is not being hidden at all. I'm doing something stupid here, but I cannot figure out what?
I've tried to look through the jQuery API documentation for submit(), but I cannot understand what is being said. Thanks.

I think the reason it may not work is because the form is submitting it's data and waiting for page to refresh... which means, it will stop all of it's javascript stuff coz it's pointless ... I could be wrong but hey, your hide would take 1 second to hide but your page could reload quicker.
$(document).ready(function() {
$('div.mainsuccess,div.mainerror').hide(0).fadeIn(1000);
$('form.register').submit(function(e) {
e.preventDefault();// will stop the form being submited...
$(this).hide(1000);
// do ajax here...
return false;
});
});
Updated
here is a list of tutorials
http://viralpatel.net/blogs/2009/04/jquery-ajax-tutorial-example-ajax-jquery-development.html
http://www.devirtuoso.com/2009/07/beginners-guide-to-using-ajax-with-jquery/
http://www.sitepoint.com/ajax-jquery/
Videos ....
http://www.youtube.com/watch?v=0CMTQtnZ0G0

Try this:
$("form").submit(function(e){
e.preventDefault();
$(this).hide(1000);
});

You'd want to incorporate an ajax call (I'm taking post) to call the php instead of reloading the page
$('form.register').submit(function(e) {
e.preventDefault();
url = $(this).attr('action');
$.post(url,$(this).serialize(), function(data) {
alert('success');
// data will return source code of the URL so you can grab that data and put it somewhere on the script like so.
$('#result').html($(data).find('form'));//form can be replaced with anything
// #result is the id of an element you wish to return the info to
});
$(this).hide(1000);
});
And you'd be done.
More info here

Well, seems that the form refreshes after submission, so it is still there.
I suggest using something like jQuery form: http://jquery.malsup.com/form/
Read up on it and you will find how to use it, and when it is submitted, it won't refresh, and using hide() you will be able to hide it.
N.B you will need jQuery referenced in your code to use jQuery form.
Enjoy.

Alternative of this script in jQuery?

I use the following script to get the content of the remaining.php.
The drawback is that sometimes it doesn't work or it is kinda slow to display the text. Is there any other way of doing this ?
Thank you
$(document).ready(function(){
$("#SubmitButton").click(function (){
$('#remaining').load('remaining.php');
});
});

You could directly include the contents of remaining.php into the initial markup but make it hidden by applying display:none; style to the #remaining element. Then when the button is clicked simply show it:
$(function() {
$('#SubmitButton').click(function () {
$('#remaining').show();
});
});
Of course if you need to pass some parameters to the script which will depend on some javascript variables that are known only at the moment the button is clicked you will need to use AJAX as you are currently doing.

If "sometimes it doesn't work or it is kinda slow", the problem is probably the server you are using, not your javascript code.
The javascript code you're showing us here doesn't really do anything that could be slow, it only binds an event on a submit button. However, what could be slow is waiting for the answer from your web server when sending a request for remaining.php
From there, there is a thousand of reasons why your web server could be slow. Maybe you could post the content of your remaining.php file so we can see what is going on in there.

This isn't really a fault of jQuery, but the speed of return from your server. Perhaps there's a better way to handle it instead of fetching a full page?
For example, if your content request was only retrieving a message, you could return JSON from your server and have jQuery handle the data:
$(document).ready(function(){
$("#SubmitButton").click(function (){
$.post('remaining.php',
null,
function(data) {
// do stuff with your JSON result
});
});
});

When you're using .load(), you're sending a request to the server to get your content, which is why it can seem slow. I'm not sure why it sometimes won't work , but I would venture to guess that you may be clicking $("#SubmitButton") before $(document).ready fires.
Depending on your implementation, you may be able to refactor your application so that the text you want to display is pre-loaded on the page.

page fetched by AJAX cannot execute any javascript

I have been with that a whole day..
I have a home page(index.php) and i have a small menu in it(made up of buttons) and a <div id=tab_contents></div>
i have used AJAX in such a way that whenever i click on any of these buttons, another page is loaded in the tab_contents-div.ie:home_tab0.php, home_tab1.php, home_tab2.php for each button respectively.
The page that i want to fetch with ajax should contain a <body onload=initialize()> ...</body> function.or it can contain a javascript code snippet to trigger the initilization() function.
that is when the button is clicked,the page lets say home_tab0.php is loaded, codes inside the home_tab0.php should trigger the initialization() frunction.
i have tried every possible way in my knowledge to make it work but without success...:(
please if i can get any help for this i would be so grateful.

With jQuery it's easy to call any function after the ajax call has returned, and data is loaded. I guess that's what you want to do. There are a few examples here:
http://api.jquery.com/jQuery.get/
E.g:
$.get('home_tab0.php', function(data) {
$('#tab_contents').html(data);
initialize();
});

This is a common problem. I recommend using jQuery and letting it take care of this for you. Reimplementing what they've done would be a waste of your time.
http://api.jquery.com/load/
$("#tab_contents").load("http://www.foo.com/loadContent");