Open external links in a new window.

external_file.js

$("a").each(function() {
  var a;
  a = new RegExp("/" + window.location.host + "/");
  if (!a.test(this.href)) {
    return $(this).click(function(event) {
      event.preventDefault();
      event.stopPropagation();
      return window.open(this.href, "_blank");
    });
  }
});

external_link.coffee

$("a").each ->
  a = new RegExp("/" + window.location.host + "/")
  unless a.test(@href)
    $(this).click (event) ->
      event.preventDefault()
      event.stopPropagation()
      window.open @href, "_blank"

# Or
$("a[href^='http:']").not("[href*='" + window.location.host + "']").attr "target", "_blank"