IE 10 bug

```
<!DOCTYPE html>
<html>                                                                                                                                                                                                                                                                          
    <head>                                                                                                                                                                                                                                                                      
        <script type="text/javascript" src="/s/js/head_old.js"></script>                                                                                                                                                                                                        
    </head>                                                                                                                                                                                                                                                                     
    <body>                                                                                                                                                                                                                                                                      
            <script type="text/javascript">                                                                                                                                                                                                                               
            head.js("http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js", function() {                                                                                                                                                                             
                var h = jQuery("head");                                                                                                                                                                                                                                         
            });                                                                                                                                                                                                                                                                 
        </script>                                                                                                                                                                                                                                                               
    </body>                                                                                                                                                                                                                                                                     
</html>
```
This fails in IE 10 because they have adopted the correct behavior of sending onreadystatechange for  both the "loaded" and the "completed" ready states instead of just one or the other, and because when the script's ready state is "loaded" in IE10, it has been downloaded but has not executed yet.