You could also just use CSS to change the fields to uppercase.
This would make all text in all input fields uppercase:
- Code: Select all
<style>
input { text-transform: uppercase; }
</style>
If you want to target specific fields, you would just need to address them.
This would make only the billing address input fields uppercase:
- Code: Select all
<style>
td.addr_val input { text-transform: uppercase; }
</style>