点击按钮打开新标签中的链接，但保留在原始页面上

heres my code please someone help me to rectify it when i click on the button it opens the link in new tab and shift the focus on new tab but i want the focus to be remained on the original tab

  <a <?php if($offerlink != '') echo 'target="_blank"';?> href="<?php echo $offerlink; ?>" class="input button red secondary responsive toggle_coupon">
                                                <?php echo $button;?>
                                            </a>
                                            <span class="input button border high secondary responsive hidden_coupon">
                                                <?php echo $code;?>
                                            </span>
                                        <?php } 
                                        elseif($url != '') {
                                            $offerlink = home_url('/') . '?visit-offer=' . $post->ID; ?>
                                            <a target="_blank" href="<?php echo $offerlink; ?>" class="input button blue secondary responsive">
                                                <?php _e('Visit offer', 'Couponize');?>
                                            </a>