JavaScript replacestring function - fast, robust, reusable

I hope this tip will come in handy for all you JavaScripters out there!

Last week I was reading this tip on SearchDomino http://searchdomino.techtarget.com/tip/1,289483,sid4_gci816795,00.html. And at the bottom was the following comment: "The below are various JavaScript equivalent of LotusScript functions, taken from various sources - mostly from the "JavaScript Bible 3rd edition" by Danny Goodman"
...followed by this function...

Now I want to say up front that I think *Danny Goodman is awesome*, and he really knows his stuff. I have learned a lot from his writings, and encourage others to seek out good examples like his.

That said, when I saw the example function given for replacing strings, I recognized that my own little succinct function, which I have continued to improve over the past few months, might come in handy to other people.

My "replacestring" function includes: *Proper handling of "" as a "search f

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or" string (common overlooked
case in other examples I have seen) *Case-insensitivity (with the default being case SENSITIVE) *Missing parameter checks so this is handled intelligently instead
of spitting out "garbage" results. *Really efficient coding, I did lots of timing checks and
.split//.join is just as fast as "regular expressions" *No knowledge of "regular expressions" required! *Even includes a "one-line" version for easy pasting!

So now I feel this is the absolutely most speedy, efficient, error-proof JavaScript "replacestring" function that I could write, handling all the cases you could possibly encounter in your JavaScripting needs.

Code

*Offered freely by Darren J Semotiuk, Collaborative Learning Network Inc., http:////www.co-learn.net/ Just keep this comment line intact. Thanks! *

Enjoy! I hope this saves people the trouble of reinventing the wheel all the time. Darren Semotiuk

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