Scroll URL inputs to the right

Could we have a new field attribute `'scroll_right'  => true` that fires this JavaScript on the input field?

``` js
var foo = document.getElementById("foo");
foo.value = "http://stackoverflow.com/questions/1962168/scroll-to-the-very-right-of-a-long-text-input";
foo.focus();
foo.setSelectionRange(foo.value.length,foo.value.length);
```
