[рони]

видим разницу "6:36"

ой а не 6:24 ?

var data = new Date();
   data = data.setHours(15,53) - data.setHours(9,29)
   function formatTime(seconds) {
       var minutes = seconds / 60 | 0,
           hours = minutes / 60 | 0,
           days = hours / 24 | 0,
           hours = hours % 24;
       seconds %= 60;
       minutes %= 60;
       return [days, hours, minutes, seconds]
   };
   alert(formatTime(data/1000));