forms
by SriSri M
HTML
<form action="post" class="myform">
<label for="">My Form</label>
</form>
<button class="btn-1">button 1</button>
<button class="btn-2" formtarget="_blank">button 2</button>
JavaScript
$('.btn-2').click(function(){
$('.myform').attr('target','_blank');
});