diff --git a/macrovision.html b/macrovision.html
index b21e287f..d6a692d0 100644
--- a/macrovision.html
+++ b/macrovision.html
@@ -32,6 +32,11 @@
 </head>
 
 <body class="toggle-bottom-name toggle-top-name toggle-scale">
+  <script type="text/javascript">
+    window.onerror = function(msg, url, line, col, error) {
+      alert("An error occured. Show all of this to chemicalcrux:\n\n" + msg + "\n" + url + "\n" + "line: " + line + "\n" + "col: " + col + "\nerror: " + error);
+    }
+  </script>
   <input hidden id="file-upload-picker" type='file' multiple>
   <div id="help-menu">
     <div id="table-of-contents-holder">
