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How To Update Hidden Field In Django Form

I am trying to figure out the best approach to modifying a hidden django form field. Or if it's even possible. I had my HTML setup to accomplish this very task and it was working perfectly. However, in order to prevent multiple submissions I had to change my HTML and now I am unable to figure out how to pass a value via an HTML button depending on what the user clicks on.
Previously, I had two buttons defined as outline below:
<button type="submit" class="button1" name="status" value="Saved"><h3 class="txtalgn4">Save</h3></button>
<button type="submit" class="button2" name="status" value="Submitted"><h3 class="txtalgn4">Submit</h3></button>
As stated above, this worked perfectly for the purpose of passing a value to an attribute for my model. The value of status was saved as expected depending on which button the user clicked on.
Now I have updated the buttons to type="button" in response to this issue that I opened up today...How To Prevent Double Submit With Form Validation
I tried using the following code:
<button type="button" class="button1" name="status" value="Saved"><h3 class="txtalgn4">Save</h3></button>
<button type="button" class="button2" name="status" value="Submitted"><h3 class="txtalgn4">Submit</h3></button>
And then I also changed the status field to {{ status.as_hidden }} in my HTML to get the value. This only works if I hardcode the status value in my database structure. I need to be able to get this value dynamically depending on what the user clicks. Is JQuery with Ajax the right approach for this? Is there some simple way to modify the hidden field depending on which button the user clicks?
Is there some better way to go about trying to get this field in a hidden manner? As stated above the HTML way with type="submit" worked perfectly, but caused problems when I was trying to prevent the user from double submitting the form. As in all things programming I solved one problem and created another.
Thanks in advance for any thoughts.

Keep using two submit buttons like you were. But instead of disabling the buttons, you disable the whole form from submitting if once submitted.
First, give your form a unique html ID.
<form id="myform">
...
</form>
<!-- JS code -->
<script type="text/javascript">
$('#myform').on('submit', function(e) {
if ($(this).hasClass('submitted')) {
// prevent submission
e.preventDefault();
return;
}
$(this).addClass('submitted');
});
</script>

How can I use the same fields for two different forms?

I'm trying to combine the login and register forms on a WooCommerce/WordPress site. The idea is that a single set of fields, username and password, could be submitted by two different forms. The first way I thought of is (simplified for clarity):
<form id="login">
<input id="username">
<input id="password">
<button type="submit">LOG IN</button>
</form>
<form id="register">
<div style="visibility:hidden!important;position:fixed!important;">
<input id="register_username">
<input id="register_password">
</div>
<button type="submit">REGISTER</button>
</form>
Basically, the layout hides the second pair of inputs but shows both buttons. Then, there's some JS that mirrors the values of corresponding fields:
var u = $('#username');
var p = $('#password');
var ru = $('#register_username');
var rp = $('#register_password')
$('#login').on('change blur focus click keyup',function(){
ru.val(u.val());
rp.val(p.val());
});
This seems to trigger a warning that an "invalid field is not focusable" - which I understand - but, can this be solved and done well? Is there a way to do this without JavaScript? Is there a better way altogether?
Let's assume I will show the hidden stuff in the case that there is no JS on the user's browser. Let's also assume I was given this design and asked to implement it, i.e. this is not a question about UX.

Just merge 2 forms into one and set 2 buttons
<form id="login">
<input id="username">
<input id="password">
<button name="submit" type="submit" value="login">LOG IN</button>
<button name="submit" type="submit" value="registration">REGISTER</button>
</form>
After submitting your form you need to check submit value like
if($_POST['submit'] == 'login')
then do code for login
else if($_POST['submit'] == 'registration')
then do code for registration

To reveal the hidden fields in the case of no javascript you would put the data between the following tags:
As far as the fields that are active when there is JavaScript, place that data within the JavaScript itself using document.write("fields here");.
The end result will be that these fields appear when JavaScript is enabled, and do not appear when JavaScript is disabled.
Hope this helps.

How to pass parameter on submit button in wordpress / php?

I have a common popup contact form at three different places in a one page wordpress website. Now the issue is that I can't identify from which button the form is sent. I have used easy modal plugin and the form is a normal bootstrap form. How can I identify this? is there something i can do with hidden fields or how? any help is appreciated . Thanks

'is there something i can do with hidden fields or how?' - Yes there is:
<form>
<!-- other input fields -->
<input type="hidden" name="form-id" value="form1">
</form>
On the server side you can get it the same way you get your other variables:
$form = $_GET["form-id"];
//or
$form = $_POST["form-id"];
In a comment you said you are new to this. Have a look at this, it might be helpful.

Try this,
<form action="action.php">
Email: <input type="text" name="name"><br>
<input type="hidden" name="from" value="topModal">
<input type="submit" value="Submit">
</form>
Change the value of topModal to any other word to identify the request of origin.

You can send hidden field in the form to distinguish them all from each other.

Form action affects only the form itself

I'm working on a single PHP file, which has 2 different forms.
Example:
<form action="index.php" method="POST">
<input type="checkbox" name="box1">
<input type="submit" value="submit1" name="submit">
</form>
<br>
<form action="index.php" method="POST">
<input type="checkbox" name="box2">
<input type="submit" value="submit2" name="submit">
</form>
My problem is, I want to make both of them work at the same time, independent from each other. For example, when I hit 'submit1', the whole index.php reloads since action is set to that page. The other checkbox might lose it's condition, if I set it to checked before submitting the first form. Might be confusing, I know.. Since I have PHP code behind, I can' really handle the whole thing between 1 form tag. That's why I'm asking if there's another option like javascript, or something. Thanks in advance!

You can use a javascript cookie. You could set it so the cookie will have the fields and values of everything in both forms, and then is saved/created upon submit. Then once the page is reloaded, javascript can split the cookie and refill the field values for the other form. You might need a hidden field in both forms so that you can identify which form was submitted. Here's a tutorial that might explain cookies to you in greater detail: http://www.tutorialspoint.com/javascript/javascript_cookies.htm

Submit form to new window only when specific submit button is pressed?

I have a form, which has a few different submit buttons on it all doing different things with the same post data.
Lets say for simplicity sake the form looks like this:
<form method="post">
<input type="hidden" name="ids" value="1,2,3,4" />
<input type="submit" id="picking" name="picking" value="Picking" />
<input type="submit" id="shipping" name="shipping" value="Shipping" />
<input type="submit" id="invoice" name="invoice" value="Invoice" />
</form>
At the moment the form submits to itself and I work out server side which submit button is pressed, build a URL from the POST data, then do a PHP redirect to what I need to go. This works fine.
However, I am looking for the form to post its data to a new window, but only when "invoice" is clicked. This rules out just adding target="_blank" to the form, as the other 2 buttons would submit to new pages as well.
I also can't split the form into 3 different forms as the data is a lot more complex than the above, and a lot of it is input by the user.
Is there a way to do this using JavaScript/JQuery? If so, where would I start?
Thanks

could you not add target blank to the form when invoice is clicked?:
$("#invoice").click(function(){
$('#form_id').attr('target', '_blank');
});
or:
$(document).on("click","#invoice",function(){
$('#form_id').attr('target', '_blank');
});

Try adding a click handler to the correct submit button.
$('#invoice').on('click', function(){
//doStuff
});
This will allow you to control the action of #invoice without affecting the others.