<div id="bshare-custom">
<a title="分享到Tumblr" id="bshare-tumblr" onclick = "window.open(\'https://www.tumblr.com/widgets/share/tool?shareSource=legacy&canonicalUrl=&url=\' + document.URL + \'&title=\' + document.title,\'_target\',\'width=600,height=500,left=300px,top=200px\')">分享到Tumblr</a>
<a href="javascript:window.open(\'https://www.instapaper.com/user/login?next=/edit?url=\' + document.URL + \'&title=\' + document.title,\'_target\',\'width=600,height=500,left=300px,top=200px\')" title="分享到Instapaper" id="bshare-instapaper">分享到instapaper</a>
</div>
还可以优化，调用官方图标，这里只是简单的实现分享代码