regexp: convert upper case to lower case

[stef25]

could anyone tell me how to do this, in the format of replace(x,x)? i have a regexp cheat sheet that has the posix notations as [:upper:] and [:lower:] but firebug throws an error when i try to use this.

id imagine this is quite simple, just cant track it down. thanks!

[DrDoc]

You have two ways of approaching this:

1) In JavaScript: string = string.toUpperCase();
2) Use CSS to display it in all caps regardless of string casing

[MarkFilipak]

FYI: Javascript uses perl-style regular expressions, not posix.

replace(/x/ig, 'X') will find all occurrences of 'x' or 'X' and replace them with 'X', and
replace(/x/ig, 'x') will find all occurrences of 'x' or 'X' and replace them with 'x',
but the toUpperCase() and toLowerCase() methods are the preferred way to shift case with an arbitrary string.