Are you talking about something like:
var myText = "THIS IS ALL UPPERCASE, FOR NOW!"
var changed = myText.toLowerCase();
In the above example, the myText variable will be converted to lowercase. So if you went:
The result would be:
this is all uppercase, for now!
Or am I completely off base and misunderstanding what you're asking?
"How did a fool and his money get together in the first place?"