title: window.open to center of screen
body: <p>I am using window.open to open a popup window like so:</p>
  
  <p><code>&lt;a href="http://path/to/url" onclick="window.open(this.href, 'sharegplus', 'height=485,width=700'); return false;" target="_blank"&gt;</code></p>
  
  <p>I want this to be centered in the screen, but without having to use <code>&lt;script&gt; inline code &lt;/script&gt;</code> and merely enter whatever I need within <code>onclick=""</code>. Can this be done?</p>