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

function jsddm_open(){
 jsddm_canceltimer();
 jsddm_close();
 ddmenuitem = jQuery(this).find('ul').css('display', 'block');
}

function jsddm_close(){
 if(ddmenuitem) ddmenuitem.css('display', 'none');
}

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

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

document.onclick = jsddm_close;