common/src/web/errors.html - external/github.com/SeleniumHQ/selenium - Git at Google

 <!DOCTYPE html>
 <html>
   <head>
     <script type="text/javascript">
       window.ERRORS = [];

       window.onerror = function(e) {
         window.ERRORS.push(e);
       };
     </script>
   </head>
   <body>
     <input type="button" value="Throw!" onclick="throw Error('boom!');"/>
   </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<script type="text/javascript">
	window.ERRORS = [];

	window.onerror = function(e) {
	window.ERRORS.push(e);
	};
	</script>
	</head>
	<body>
	<input type="button" value="Throw!" onclick="throw Error('boom!');"/>
	</body>
	</html>