DEPRECATION WARNING: :popup has been deprecated

application.js

//jQuery
$('a[data-popup]').live('click', function(e) { 
  window.open($(this).href); 
  e.preventDefault(); 
});

//Prototype.js
document.on("click", "a[data-popup]", function(event, element) { 
  if (event.stopped) return; 
  window.open($(element).href); 
  event.stop(); 
});

index.html.erb

<!-- Inline -->
<a href="javascript:window.open('/my_controller/my_method/id','popup_name','height=400,width=580,toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=no,scrollbars=yes')">Link name</a>