I'm trying to mimic modern browsers' "copy url" functionality.

When viewing the url you don't see the `http://`. If you copy it to the clipboard, `http://` will be added. So far I have this: 

```
$('#address input').bind('copy', function() {
  $.fn.changevalue = function (v) {
    return $(this).val(v).trigger('change');
  }
  var origval = $(this).val();
  $(this).changevalue('http://' + origval);
});

```

This adds the `http://` to the input field, if action 'copy' is detected but it stops the copy to clipboard. The function also adds `http://` to main input field, that I don't want. I just want to add it to clipboard.