Where should I add style to jQuery plugin elements?

Question

Is it considered good practice to add style to the elements generated by the jQuery plugin in the script itself or in an external stylesheet?

(function($) {
    $.myplugin= function(options) {
        var options = jQuery.extend({
            backgroundColor: '#0066cc',
            borderColor: '#003366',
            borderWidth: '1px',
            fontColor: '#66ccff'
            // etc...
        }, options);
        var html = '<div id="__plugin">...</div>';
        var $plugin= $(html).css({
                            'color': options.fontColor,
                            'background-color': options.backgroundColor
                            'border-color': options.borderColor,
                            'border-width': options.borderWidth,
                            'display': 'none'
                            // etc...                                
                        });         
        return $plugin.appendTo(document.body);
    };
})(jQuery);

Should I make the approach higher and allow the plugin users to pass parameters for the style settings, or should I remove the style elements and use an external style sheet?

My gut reaction tells me that I should use the latter, but I'm curious what standard practice is, or if there is even one?

Answer 1

pluggins, . , , html . . :

http://www.learningjquery.com/2009/03/making-a-jquery-plugin-truly-customizable

!