var ptimeout    = 500;
var pclosetimer = 0;
var pddmenuitem = 0;

$(document).ready(function() {
   $('.productfeature').hover(function() {  
     a = $(this).attr('alt');
     $('#feature_popup').html(a); 
     pjsddm_open();   
   }, function() {
     pjsddm_timer();
   });
});

function pjsddm_timer()
{  pclosetimer = window.setTimeout(pjsddm_close, ptimeout);}

function pjsddm_close()
{  if(pddmenuitem) pddmenuitem.css('visibility', 'hidden');
    $('#feature_popup').html('loading informations...');}

function pjsddm_open()
{  pjsddm_canceltimer();
   pddmenuitem = $('#feature_popup').css('visibility', 'visible');}

function pjsddm_canceltimer()
{  if(pclosetimer)
   {  window.clearTimeout(pclosetimer);
      pclosetimer = null;}}