Redirecting old page

Whenever someone leaves my site by clicking on a link to another site on my website the link opens in a new tab on desktop or a new window on mobile. I was wondering when that new tab opens whether once there not viewing the old tab it could go onto another page automatically, like a thank you page with the social media links.

Hope that makes sense,

Thanks

I'm not sure, have I understood your question but probably you need something like this http://jsfiddle.net/zyhrs5j4/

<a href="https://www.google.com/" target="_blank" onclick="javascript:goToThanksPage()">Google</a>

EDIT:

Base on our comments, here is code which I made after inspect your page, and it will add on click function on each link:

<script>
var links = document.querySelectorAll(".feed-item a");
for(var i = 0; i < links.length; i++){
    links[i].onclick = function() {
        location.href="/mypage.html";
    }
}



</script>