Set first-letter caps to style

jQuery.fn.addCaps = function() {
    this.each(function ()
    {
        var words = $(this).html().split(" ");
        for (var i=0; i<words.length; i++)
        {
            // add caps to first letter
            var firstLetter = words[i].substr(0,1).replace(/(\w)/i, '<span class="cap">$1</span>');
            words[i] = firstLetter + words[i].substr(1);
        }
        return $(this).html(words.join(" "));
    });
}