f

        <form action="includes/update_pass.php" method="post">
          <input type="hidden" name="id" value=<?php echo "'".$_SESSION['user_id']."'" ?> />
          <div class="form-group">
            <input class="form-control" id="currentPass" name="currentPass" placeholder="Current Password" required />
          </div>
          <div class="form-group">
            <input class="form-control" id="newPass" name="newPass" placeholder="New Password" required />
          </div>
          <div class="form-group">
            <input class="form-control" id="confirmPass" name="confirmPass" placeholder="Confirm New Password" required />
          </div>
          <button class="btn btn-primary" onclick="passformhash(this.form, this.form.currentPass, this.form.newPass, this.form.confrimPass);">Update Password</button>

        </form>