<!DOCTYPE html>
<html>
<title>Print form</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<body>
<form method="post" action="" id="myfrm">
<fieldset>
<legend>Personal information:</legend>
First name:<br>
<input type="text" name="firstname">
<br> Last name:<br>
<input type="text" name="lastname">
<br><br>
<input type="submit" value="Submit">
</fieldset>
</form>
<p align="center"><input type="button" onclick="myPrint('myfrm')" value="print"></p>
<script>
function myPrint(myfrm) {
var printdata = document.getElementById(myfrm);
newwin = window.open("");
newwin.document.write(printdata.outerHTML);
newwin.print();
newwin.close();
}
</script>
</body>
</html>