I have this script performed on submit:
function analyze() {
var answer = document.forms["questions"]["answer1"].value;
var item = document.getElementById("content");
item.innerHTML=answer;
}
Script is performed, but div doesn't keep the value, it changes back.
When you do a submit, your page is going to re-render, causing all of your elements to get back to their initial state. So changing the your div or whatever you have in the HTML with class content is going to reset to being back to being blank.
You probably want to save the answer in Browsers LocalStorage or some sort of data structure and then request it out of there.
Save your answer value to localStorage or sessionstorage and then show the same value in your div. If you are submitting form then it will re-load the page and clear the innerHTML of div.
A submit button causes the page to rerender. You have a number of options to prevent that:
Don't use a submit button, use a normal button that happens to SAY submit. You would then run the function "onClick" for the button, not "onSubmit" for the form. (this is what I recommend)
Return false from that function and/or call PreventDefault.
Actually submit it to the server and have the server do the work and return the page (probably not a good choice for performance reasons).
EDIT: you could do something with local or session storage, but that seem a bit rube-goldburg for the problem you have.
Related
When I am clicking a submit button on my HTML form, the function related to the button is called and it does its work. After completing the work a mail notification is sent which is consuming too much time. After that a confirmation message is displayed on the same HTML page (without using Ajax; i.e., the page is refreshed).
I want to avoid letting the user click the submit button multiple times in confusion during the waiting period of sending mails. So I am thinking that I should disable the button after it is pressed once.
How can I do this?
Can you please suggest any other technique to achive this goal without disabling the button?
Simply:
<form action="file" method="post" onsubmit="this.submit_button.disabled = true;">
<input name="submit_button" type="submit" value="Submit" />
</form>
You can achieve this without disabling the button by using a nonce, however it is a bit more complex. Essentially, when the user requests the page that has the form that will be submitted, assign a unique id to that user's request (store it somewhere on the server, and make sure it's submitted along with the form). When the form is then submitted, look up the unique id to make sure it's not in process or already processed, and then if it's OK to proceed, mark the unique id as "in process", process the form, and then mark it as processed. If when you do the initial check and the page is in process or already processed, you'll need to take the necessary action (redirect them to a confirmation page if it was successfully processed, or back to the form if it was not successfully processed).
How can I do this?
You can take a look at the javascript code in this page:
http://www.codinghorror.com/blog/archives/000096.html
<input type="Button" onClick="this.value='Submitting..';this.disabled=true;" value="Submit">
Can you please suggest any other technique to achive this goal without disabling the button?
Show a busy panel:
"... Your request is being processed please wait..."
(source: vodafone.co.uk)
If you disable a button right before submitting, then the parent form will not be submitted. You need to disable the button after submitting. Best way it to use JavaScript's setTimeout() function for this.
<input type="submit" id="foo" onclick="setTimeout('document.getElementById(\'' + this.id + '\').disabled=true;', 50);">
50ms is affordable enough to give the form the chance to get submitted.
To enhance the user experience more, you could of course append a message or a loading image dynamically during the same onclick event as already suggested by others.
Assuming you don't want to disable the button you could always pop up a modal on the page. This will block the user's interaction with the page. You could throw some kind of loading spinner in there with a message that the submit is in progress.
I don't understand why it is a problem, as you are doing a regular submit, the user should see a white page while you are processing in the back end.. But in case if you want to disable the button, here is the code, use it on the button
onclick="this.disabled=disabled"
You could have the button be disabled, but still seem active to the user. In the function that gets called after the button is hit the first time, have the first thing it does set a global variable like disableButton to true. When the user presses the button, have that go to a function called something like checkSubmitStatus. If disableButton = true, return false. if disableButton = false, trigger the submit function.
You have still disabled the button, but your users can press away unaware.
I'm not submitting anything, but Google Chrome 31 doesn't update the button look while calculating, so i came up with this workaround:
<style>
.btnMenu{width:70px; font-size:12px}
.btnMenu:disabled{background-color:grey}
</style>
<input type="button" class="btnMenu" value="Total" onmousedown="b=this; b.disabled=true; b.v=b.value; b.value='Calculating...'; setTimeout('updateTotals(); b.value=b.v; b.disabled=false', 100)"/>
Is it possibe to change the return URL of a button whose job is submitting a form to the server? The main deal here is that I don't have the script that controls the button, hence the word "stealing."
If you are curious about the use case, I have a Salesforce Visualforce page that has an embedded Flow in it. I want to jump out of the Flow when the user is half way through and a certain condition is met.
Assuming the button is not in an iFrame...
$('#some_button').click(function (e) {
e.preventDefault();
// Do stuff here then submit the form..
$('#some_form').submit();
});
You could also use this method for $('#some_form').submit().... You can read more about it here.
I have a javascript method that creates a bunch of elements on click. When I call it from a button, it only stays on the screen for the duration of that click. when I enter the exact same code into the console, however, it stays on the page until I reload or navigate away (which is exactly what I want).
JavaScript code: (it's the only method in the js file)
function post() {
var postTitle = document.createElement('h3');
var nodeTitle = document.createTextNode('Immigration is good.');
postTitle.appendChild(nodeTitle);
etc....
Where I'm calling it in the html:
<input type="submit" id="post-button" value="Post" onclick="post()">
The script tag is in the header of the html page.
How do I get it to stay on the page past the duration of the click? Any ideas why it's being immediately obliterated?
You still need to cancel the form's submission. A return false; from post, if it exists, won't work because the onclick attribute is calling post() but not returning anything.
You could change it to onclick="return post();", but it would be better to attach the handler directly, and to the submit event of the form and not the click event of the button (people do use Enter sometimes!):
document.getElementById('some-form').onclick = post;
Look at what the button does. It is posting!
When you click the button it is redirecting you back to the page you are currently on! It seems like it is showing up and disappearing what is actually happening though is that the page is refreshing.
There are a couple of options to do what you want. Submitting via Ajax or having your server respond with a hashbang/cookie set to direct the page to do as you wish.
having some real problems with jquery at the moment. Basically what I have so far is. The form is submitted once the form is submitted a grey box pop's up with the relevant infomation.
What I need to do though is refresh the whole page then allow the grey box to appear.
I have the following code
$("#ex1Act").submit(function() {
//$('#example1').load('index.php', function()
$("#example1").gbxShow();
return true;
});
the line which is commented out load's the page again after the form is submitted the other code makes the grey box pop-up.
Is their a way to say once the:
$('#example1').load('index.php', function()
has been exucted do this:
$("#example1").gbxShow();
hope this makes sense.
This is not possible.
Once the form is submitted, the Javascript running on the page that submitted the form is completely gone; it cannot affect the page that the form returns.
Instead, you should put server-side code in the form that writes $("#example1").gbxShow(); in a separate <script> block if the form has been submitted.
Why not just submit the form normally (i.e., not using JavaScript) and add a variable to the resulting page signalling the need to display the grey box? Like so:
<?php if(isset($_POST['submit'])): ?>
<script type="text/javascript">
var showGreyBox = true;
</script>
<?php endif; ?>
...
<script type="text/javascript">
$(function(){
if(showGreyBox !== undefined){
// execute code to show the grey box
}
});
</script>
Something like that, maybe?
The problem you have is that the web page is "stateless". This means that you can't do a bit of JavaScript, refresh the page and continue on with your JavaScript. When you refresh the page, you lose your current state and the page starts from scratch.
You will need to re-engineer your design to bear in mind the page lifecycle (i.e. all JavaScript stops permanently on navigation).
One solution may be to use the jQuery AJAX forms plugin, which will submit the form to the server and give you back the result of the submission, which would avoid breaking the page lifecycle. You could then display the box as you wish.
The standard way to do this is to have the server return the gray box contents in the response to the form post.
You could probably do this in jquery by putting the page and the grey box into separate iFrames so that it would be safe from the page refresh
When I am clicking a submit button on my HTML form, the function related to the button is called and it does its work. After completing the work a mail notification is sent which is consuming too much time. After that a confirmation message is displayed on the same HTML page (without using Ajax; i.e., the page is refreshed).
I want to avoid letting the user click the submit button multiple times in confusion during the waiting period of sending mails. So I am thinking that I should disable the button after it is pressed once.
How can I do this?
Can you please suggest any other technique to achive this goal without disabling the button?
Simply:
<form action="file" method="post" onsubmit="this.submit_button.disabled = true;">
<input name="submit_button" type="submit" value="Submit" />
</form>
You can achieve this without disabling the button by using a nonce, however it is a bit more complex. Essentially, when the user requests the page that has the form that will be submitted, assign a unique id to that user's request (store it somewhere on the server, and make sure it's submitted along with the form). When the form is then submitted, look up the unique id to make sure it's not in process or already processed, and then if it's OK to proceed, mark the unique id as "in process", process the form, and then mark it as processed. If when you do the initial check and the page is in process or already processed, you'll need to take the necessary action (redirect them to a confirmation page if it was successfully processed, or back to the form if it was not successfully processed).
How can I do this?
You can take a look at the javascript code in this page:
http://www.codinghorror.com/blog/archives/000096.html
<input type="Button" onClick="this.value='Submitting..';this.disabled=true;" value="Submit">
Can you please suggest any other technique to achive this goal without disabling the button?
Show a busy panel:
"... Your request is being processed please wait..."
(source: vodafone.co.uk)
If you disable a button right before submitting, then the parent form will not be submitted. You need to disable the button after submitting. Best way it to use JavaScript's setTimeout() function for this.
<input type="submit" id="foo" onclick="setTimeout('document.getElementById(\'' + this.id + '\').disabled=true;', 50);">
50ms is affordable enough to give the form the chance to get submitted.
To enhance the user experience more, you could of course append a message or a loading image dynamically during the same onclick event as already suggested by others.
Assuming you don't want to disable the button you could always pop up a modal on the page. This will block the user's interaction with the page. You could throw some kind of loading spinner in there with a message that the submit is in progress.
I don't understand why it is a problem, as you are doing a regular submit, the user should see a white page while you are processing in the back end.. But in case if you want to disable the button, here is the code, use it on the button
onclick="this.disabled=disabled"
You could have the button be disabled, but still seem active to the user. In the function that gets called after the button is hit the first time, have the first thing it does set a global variable like disableButton to true. When the user presses the button, have that go to a function called something like checkSubmitStatus. If disableButton = true, return false. if disableButton = false, trigger the submit function.
You have still disabled the button, but your users can press away unaware.
I'm not submitting anything, but Google Chrome 31 doesn't update the button look while calculating, so i came up with this workaround:
<style>
.btnMenu{width:70px; font-size:12px}
.btnMenu:disabled{background-color:grey}
</style>
<input type="button" class="btnMenu" value="Total" onmousedown="b=this; b.disabled=true; b.v=b.value; b.value='Calculating...'; setTimeout('updateTotals(); b.value=b.v; b.disabled=false', 100)"/>