It is a small and simple plugin which Capitalize all the text inside a table. The plugin also has the option to convert all words to small letters.

capitalize_text.js

(function($) {
    $.fn.tableCap = function(params) {
        params = $.extend( {lower : false, toggle : true}, params);

        var selectedElement = $(this);

        toggleText = (function (convert) {
            $('tr td',selectedElement).each(function () {
                convert($(this).html(), $(this))
            });
        });

        var Changetext = {
            convertTolower : function() {
                toggleText( (function(element_text, element) {
                    element.html(element_text.toLowerCase());
                }) )
            },

            convertToupper : function() {
                toggleText( (function(element_text, element) {
                    element.html(element_text.charAt(0).toUpperCase() + element_text.substring(1).toLowerCase())
                }) )
            }
        }
        params.lower ? Changetext.convertTolower() : Changetext.convertToupper();
    }
})(jQuery);