Form Submit - Open New Tab at same time - forms

Question

I have a contact form on my website. I'm using a free bootstrap template that I've been editing and configuring because I don't know much about coding.
I want a new tab to open and go to a specific website when the user hits the submit button (so both submit the form, and take them to a new web page). How can I do that?
<form name="sentMessage" id="contactForm" target="blank" novalidate>
<div class="row">
<div class="col-md-6">
<div class="form-group">
<input type="text" class="form-control" placeholder="Your Name *" id="name" required data-validation-required-message="Please enter your name.">
<p class="help-block text-danger"></p>
</div>
<div class="form-group">
<input type="email" class="form-control" placeholder="Your Email *" id="email" required data-validation-required-message="Please enter your email address.">
<p class="help-block text-danger"></p>
</div>
<div class="form-group">
<input type="tel" class="form-control" placeholder="Your Phone *" id="phone" required data-validation-required-message="Please enter your phone number.">
<p class="help-block text-danger"></p>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<textarea class="form-control" placeholder="Your Message *" id="message" required data-validation-required-message="Please enter a message."></textarea>
<p class="help-block text-danger"></p>
</div>
</div>
<div class="clearfix"></div>
<br><br>
<div class="col-lg-12 text-center">
<div id="success"></div>
<button type="submit" class="btn btn-xl">Send Message</button>
</div>
</div>
</form>

Answer 1

You just need to add in the
action="/newpage.php" method="post"
so in your example, it would look like:
<form name="sentMessage" id="contactForm" action="/newpage.php" method="post" novalidate>
Hope that helps... Note the /newpage is the page (wherever it is) which will process your POST request.

Answer 2

Please use the javascript like this.
then will open new tab as you said
function func1(){
window.open('https://google.com', '_blank');
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<form name="sentMessage" id="contactForm" onsubmit="func1()" novalidate>
<div class="row">
<div class="col-md-6">
<div class="form-group">
<input type="text" class="form-control" placeholder="Your Name *" id="name" required data-validation-required-message="Please enter your name.">
<p class="help-block text-danger"></p>
</div>
<div class="form-group">
<input type="email" class="form-control" placeholder="Your Email *" id="email" required data-validation-required-message="Please enter your email address.">
<p class="help-block text-danger"></p>
</div>
<div class="form-group">
<input type="tel" class="form-control" placeholder="Your Phone *" id="phone" required data-validation-required-message="Please enter your phone number.">
<p class="help-block text-danger"></p>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<textarea class="form-control" placeholder="Your Message *" id="message" required data-validation-required-message="Please enter a message."></textarea>
<p class="help-block text-danger"></p>
</div>
</div>
<div class="clearfix"></div>
<br><br>
<div class="col-lg-12 text-center">
<div id="success"></div>
<button type="submit" class="btn btn-xl">Send Message</button>
</div>
</div>
</form>
And also you can add action property to form tag.
then if you click the button then will open the new tab as your request, and then will send request to file you specified in action property.
if your purpose is only to open new tab, and don't need to submit form, then please add
return false
at the end of func1 function in my code