I want to make everything I write in a textfield to be capital letters. As I write, not after losing focus.
How do I do this using jQuery?
You may need to use combination of these.
using the text-transform style only renders the type in upper-case, although the value may well be lower case.
The javascript will only change current text to upper once the field changes or focus is lost
you can use gazler's jquery or simply inline javascript
e.g. onblur='javascript:this.value=this.value.toUpperCase();'
This means that the text value will appear uppercase and actually be uppercased when the value changes / control loses focus.
HTH Sam