digitalBush/jquery.maskedinput — pull request #166 by Sorgor (2013-08-22 06:39:33+00:00)
Title: added ability to apply transformation function to entered char on keypre...

Hi, I added ability to apply transformation function to entered char on keypress event.

this can be used like that:
```javascript

$("#po").mask("PO: aaa-999-***",
{transform: function(s){
return s.toUpperCase()
}
});
```
or
```javascript

$("#po").mask("PO: aaa-999-***",
{transform: function(s){
if (s == 'm') return 'n';
else return s;
}
});
```
or something like that