I have a simple form:

<form id=frm action=process.php method=post>

    <input type=text id=shortcut name=shortcut />

</form>

In process.php:

$gomenu = $_POST['shortcut'];

if(strpos($gomenu, /) === 0) {

    //if $gomenu contains `/`, then it should open in new tab

    header('Location: newTab.php'); //--> How to open this into a new tab?

} else {

    header('Location: somePage.php'); //--> Redirect to somePage.php on the same tab

}

When the shortcut contains value of /, then it should be redirect to a new tab, else the same tab. How to do that? I know it's impossible to do that by using header();, but I have no idea how to do that. Any ideas? Thanks.

PS: The form is intended to fill by a menu code, then it has to redirect the page based on the menu code filled on shortcut (as in SAP). But if it contains a specific prefix, a different way should be implemented.

UPDATE

Above the form, I've added this script:

<script>

    $(#frm).ajaxForm({

        url: 'process.php', type: 'post'

    });

</script>

And on the process.php:

$gomenu = $_POST['shortcut'];

if(strpos($gomenu, /) === 0) {

    print   <script>

                 window.open('newTab.php', '_newtab');

             </script>;

} else {

    header('Location: somePage.php');

}

But then it opened in a new pop-up window. How to open it on the newtab?

ANSWER (@fedmich's answer)

        $(document).ready(function () {

            $('frm#frm').submit(function(){

                var open_new_tab = false;

                var v = $('#shortcut').val();

                if(v.match('/') ){

                    open_new_tab = true;

                }



                if ( open_new_tab ) {

                    $('frm#frm').attr('target', '_blank');

                } else {

                    $('frm#frm').attr('target', '_self');

                }

            });

        });