(function($){
  var options = {
    initCollapse: true,
    bindEvent: 'click',
    collapsedClass: 'collapsed'
  };

  $.fn.simpleExpander = function(target, opts){
    if (opts) { $.extend(options, opts); }
    $(this).addClass('simpleExpander');
    if (options.initCollapse)
        $(this).addClass(options.collapsedClass);
    return initializeExpander(this, target, options);
  };
  function initializeExpander(trigger, target, options) {
    toggleTarget(trigger, target, options.collapsedClass);
    $(trigger).bind(options.bindEvent, function(){
      $(this).toggleClass(options.collapsedClass);
      toggleTarget(trigger, target, options.collapsedClass);
    });
    return $(trigger);
  }
  function toggleTarget(trigger, target, collapsedClass) {
    if(target) 
      $(trigger).hasClass(collapsedClass) ? 
          $(target).hide() : $(target).show();
  }

})(jQuery);