/*
Ex. $('a.link').selectedClass({ elements: 'a.link' });
*/
jQuery.fn.selectedClass = function(options) {
    var settings = {
        className: 'selected',
        elements: 'a'
    };
    options = jQuery.extend(settings, options);

    this.click(function() { change(); });

    function change() {
        $(options.elements).removeClass(options.className);
        $(this).addClass(options.className);
    }
}