Develop Reference

How to prevent browser from opening a new page on form submit?

There's an email subscription form in a web page, When someone enters his email and clicks on submit button, We don't want this page to be redirected to form action url, We just want it's submit button text value to be converted to another text, something like "Thank You!". How is it possible? Should I go through ajax? or javascript?
Here's the form:
<form class="ml-block-form" action="//app.mailerlite.com/webforms/submit/myownID" data-code="myownID" method="POST" target="_blank">
<div class="form-group ml-field-email ml-validate-required ml-validate-email">
<input class="newsletter-email" type="email" name="fields[email]" placeholder="Email*"/>
</div>
<input type="hidden" name="ml-submit" value="1" />
<p>
<input class="newsletter-submit" type="submit" value="Get Updates!"/>
</p>

For starters remove target="_blank" from your form tag.
Then, within your jQuery, do something along the lines of this:
$(".ml-block-form").submit(function(){
var vals = $(this).serialize();
$.ajax({
url: "postpage.php",
method: "POST",
data: vals,
success: function(data) {
$("#formsubmit").val("Thank you!");
}
});
return false; // prevent from submit
});
I've altered your HTML as well, as it was originally very messy. You can of course add the other elements back if you need:
<form class="ml-block-form" action="" data-code="myownID" method="post">
<input id="mainval" type="email" name="fields[email]" placeholder="Email*">
<input id="hiddenval" name="ml-submit" value="1" />
<input id="formsubmit" type="submit" value="Get Updates!"/>
</form>

You can simply remove target="blank" because blank value opens the linked document in a new window.

Instead of
<input class="newsletter-submit" type="submit" value="Get Updates!"/>
use
<button id="newsletter-submit" value="Get Updates!"/>
(note that I changed class for id)
And then use jQuery to handle the click on the button:
$("#newsletter-submit").click(function () {
$(this).prop("value", "Thank You!");
// do something else with the input values e.g. send them via ajax to a server script
});

Append form input text to div on submit

At the moment I'm just trying to post their comment to the comment div, commentsbox1.
HTML:
<form id="commentform" name="commentform" onsubmit="submitComment();">
<input id="commenttext" type="text" placeholder="Leave a comment..." name="commenttext">
<input type="submit" style="position: absolute; left: -9999px"> <!-- submit by pressing enter -->
</form>
Javascript:
function submitComment(){
var commenttext = $('#commenttext').val();
$('#commentsbox1').append(commenttext);
};
Currently it seems to do nothing at all. It says the function is unused too.

Try this:
<form id="commentform" name="commentform" onsubmit="submitComment(event);">
and in the function:
function submitComment(e){
e.preventDefault();
var commenttext = $('#commenttext').val();
$('#commentsbox1').append(commenttext);
};
This will prevent refresh of the page.

It works, but before you see the result, the page is refreshed.
function submitComment(){
var commenttext = $('#commenttext').val();
$('#commentsbox1').append(commenttext);
return false;
};

When you submit the form you should override the normal behaviour of the button:
$('#myBtn').on('click',function(event) {
event.preventDefault();
//do what you want to do
});

Using Javascript To redirect am embedded Form when submit button is clicked

I want a javascript to redirect the embedded form below when the submit button is clicked
The form is below
<div class="o-form-header"><h2 id="o-form-title">Mail List Subscription Form</h2><p id="o-form-description">Please fill in and submit the form below to subscribe to our mailing list.</p></div> <form action="http://sendfree.com/subscribe.php" method="post" accept-charset="UTF-8"><div class="o-form-row"><label for="FormValue_EmailAddress">Email Address</label><input type="text" name="FormValue_Fields[EmailAddress]" value="" id="FormValue_EmailAddress"/></div><div class="o-form-row"><label for="FormValue_CustomField689">Your Name</label><input type="text" name="FormValue_Fields[CustomField689]" value="" id="FormValue_CustomField689"/></div> <input type="hidden" name="ret_s" value="44" /> <input type="submit" name="FormButton_Subscribe" value="Submit" id="FormButton_Subscribe"/><input type="hidden" name="FormValue_ListID" value="8085"/><input type="hidden" name="FormValue_Command" value="Subscriber.Add" id="FormValue_Command"/></form>
The javascript I use below but it not redirecting to google.com after the submit button is clicked
<script type="text/javascript">
document.getElementById("FORMBUTTON_SUBSCRIBE").onclick=function()
{
window.location.href="http://www.google.com"
}
</script>
Please Help

<script type="text/javascript">
document.getElementById("FORMBUTTON_SUBSCRIBE").onclick=function()
{
location.replace("http://www.google.com");"
}
</script>

document.getElementById("FORMBUTTON_SUBSCRIBE").onclick=function(event)
{
window.location="http://www.google.com";
event.preventDefault();
}
Default action on form button click is submitting of form, so we should prevent it.

I used Eventlistener but not still redirecting, check what may be wrong as am not good in javascript
<script>
document.getElementById("FormButton_Subscribe").addEventListener("click", function(){
window.location.href=" http://www.google .com";
});
</script>

Detect post action in a form

I want to do something when a form is submitted.
var ispostaction = false;
$("#myform").submit(function () {
ispostaction = true;
});
When the form is submitted the .submit(function ()) is not called.
Is there anything wrong that I'm doing? I have the form id as myform.
I would appreciate any help.
Here's my xhtml page. I'm using JSF 2
<form id="myform" class="someclass" enctype="application/x-www-form-urlencoded"
action="pagename.jsf" method="post">
// custom input text field
// selectOneMenu
// a few more input text fields
// submit button is below
<input id="javax.faces.ViewState" type="hidden" autocomplete="off" value="...." name="javax.faces.ViewState">
</form>

The jquery documentation:
The submit event is sent to an element when the user is attempting to submit
a form. It can only be attached to <form> elements. Forms can be submitted
either by clicking an explicit <input type="submit">, <input type="image">,
or <button type="submit">, or by pressing Enter when certain form elements
have focus.
Calling the submit function will not trigger the submit event. You can "fix" this by adding a hidden button which you click from jquery instead. Most, if not all, browsers unfortunately display the same behavior.
<html>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
<body>
<form id="myform" enctype="application/x-www-form-urlencoded"
action="posturl" method="post">
// custom input text field
// selectOneMenu
// a few more input text fields
// submit button is below
<input id="javax.faces.ViewState" type="hidden" autocomplete="off" value="...." name="javax.faces.ViewState">
<input type="text" value="a value" />
<input id="submit" type="submit" value="submit" style="display: none;" />
</form>
<script type="text/javascript">
$(document).ready(function() {
$("#myform").bind('submit', function() {
alert('');
});
$("#submit").click();
});
</script>
</body>
</html>

E-mail form interactivity

I'm a web development student and I need some help. I have the code below; How do I make it work only when the form is submitted and not the text field is clicked. I also would like it to get and insert the textField's value in the .thanks Div. Please help me learn.
<script type="text/javascript">
$(document).ready(function(){
$(".quote").click(function(){
$(this).fadeOut(5000);
$(".thanks").fadeIn(6000);
var name = $("#name").val();
$("input").val(text);
});
});
</script>
<style type="text/css">
<!--
.thanks {
display: none;
}
-->
</style>
</head>
<body>
<form action="" method="get" id="quote" class="quote">
<p>
<label>
<input type="text" name="name" id="name" />
</label>
</p>
<p>
<label>
<input type="submit" name="button" id="button" value="Submit" />
</label>
</p>
</form>
<div class="thanks"> $("#name").val(); Thanks for contacting us, we'll get back to you as soon as posible</div><!-- End thanks -->

This is a bit rough and ready but should get you going
$(document).ready(function(){
$("#submitbutton").click(function(){
//fade out the form - provide callback function so fadein occurs once fadeout has finished
$("#theForm").fadeOut(500, function () {
//set the text of the thanks div
$("#thanks").text("Thanks for contacting us " + $("#name").val());
//fade in the new div
$("#thanks").fadeIn(600);
});
});
});
and I changed the html a bit:
<div id="theForm">
<form action="" method="get" id="quote" class="quote">
<p>
<label>
<input type="text" name="name" id="name" />
</label>
</p>
<p>
<label>
<input type="button" name="submitbutton" id="submitbutton" value="Submit" />
</label>
</p>
</form>
</div>
<div id="thanks">Thanks for contacting us, we'll get back to you as soon as posible</div><!-- End thanks -->

There are several things at issue here:
By using $('.quote').click(), you're setting a handler on any click event on any element contained within the <form>. If you want to catch only submit events, you should either set a click handler on the submit button:
// BTW, don't use an id like "button" - it'll cause confusion sooner or later
$('#button').click(function() {
// do stuff
return false; // this will keep the form from actually submitting to the server,
// which would cause a page reload and kill the rest of your JS
});
or, preferably, a submit handler on the form:
// reference by id - it's faster and won't accidentally find multiple elements
$('#quote').submit(function() {
// do stuff
return false; // as above
});
Submit handlers are better because they catch other ways of submitting a form, e.g. hitting Enter in a text input.
Also, in your hidden <div>, you're putting in Javascript in plain text, not in a <script> tag, so that's just going to be visible on the screen. You probably want a placeholder element you can reference:
<div class="thanks">Thanks for contacting us <span id="nameholder"></span>, we'll get back to you as soon as possible</div>
Then you can stick the name into the placeholder:
var name = $("#name").val();
$('#nameholder').html(name);
I don't know what you're trying to do with the line $("input").val(text); - text isn't defined here, so this doesn't really make any sense.