function addEvent(element, type, handler) {
  if (!handler.$$guid) handler.$$guid = addEvent.guid++;
  if (!element.events) element.events = {};
  var handlers = element.events[type];
  if (!handlers) {
    handlers = element.events[type] = {};
    if (element["on" + type]) {
      handlers[0] = element["on" + type];
    }
  }
  handlers[handler.$$guid] = handler;
  element["on" + type] = handleEvent;
};
addEvent.guid = 1;

function removeEvent(element, type, handler) {
  if (element.events && element.events[type]) {
    delete element.events[type][handler.$$guid];
  }
};

function handleEvent(event) {
  event = event || window.event;
  var handlers = this.events[event.type];
  for (var i in handlers) {
    this.$$handleEvent = handlers[i];
    this.$$handleEvent(event);
  }
};

var timeout    = 500;
var closetimer = 0;
var ddmenuitem = 0;

function jsddm_open()
{  jsddm_canceltimer();
   jsddm_close();
   ddmenuitem = $(this).find('ul').css('visibility', 'visible');}

function jsddm_close()
{  if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');}

function jsddm_timer()
{  closetimer = window.setTimeout(jsddm_close, timeout);}

function jsddm_canceltimer()
{  if(closetimer)
   {  window.clearTimeout(closetimer);
      closetimer = null;}}

document.onclick = jsddm_close;