Open flipboard share modal

i'm trying to make a flipboard share button that opens as a modal , similar to facebook share button Facebook modal

This is the code i used on my onclick

<a class="linking" href="javascript:void(0);" onclick="window.open('https://share.flipboard.com/bookmarklet/popout?v=2&title=<?= website_title;?>&url=<?= website_url;?>'); return false;" title="flipboard share">