Odd SDK code in Spark button

[Justin Mclean]

HI,

Looking to see if join("") was used anywhere else found this:

        if (!styleName || styleName is String)
        {
            if (_emphasized)
                super.styleName = style + " emphasized";
            else 
                super.styleName = style.split(" emphasized").join("");
        } 

Would not be a performance bottle neck but why not just use replace?

Justin