Find mixed mode issues in content. The src attribute matches scripts, images, iframes. The link href attribute is used for css.

findMixedModeErrors.js

jQuery(document).ready(function() {
  var $srcitems = jQuery("[src^='http://']");
  var $hrefitems = jQuery("link[href^='http://']");
  var totalitems = $srcitems.length + $hrefitems.length;
  if (totalitems > 0) {
    alert('Found ' + totalitems + ' items that will trigger mixed mode. Check the console for these items.');
    for (var i = 0, len = $srcitems.length; i < len; i++) {
      console.log($srcitems[i]);
    }
    for (var i = 0, len = $hrefitems.length; i < len; i++) {
      console.log($hrefitems[i]);
    }
  } else {
    alert('No mixed-mode content warnings currently on this page.');
  }
});