javascript - How to get server time every seconds -

my question client time displayed, want display server time every seconds.

function getcount(ddate,iid){  var date = new date(); datenow = date;  // if time past if(amount < 0){  } // else date still else{     days=0;hours=0;mins=0;secs=0;out="";      amount = math.floor(amount/1000);//kill "milliseconds" secs      days=math.floor(amount/86400);//days     amount=amount%86400;      hours=math.floor(amount/3600);//hours     amount=amount%3600;      mins=math.floor(amount/60);//minutes     amount=amount%60;      secs=math.floor(amount);//seconds      document.getelementbyid(iid).innerhtml=days;     document.getelementbyid('countbox1').innerhtml=hours;     document.getelementbyid('countbox2').innerhtml=mins;     document.getelementbyid('countbox3').innerhtml=secs;      settimeout(function(){getcount(ddate,iid)}, 1000); } } 

if want avoid network traffic checking time server every second just: (1) have server pass time in way store in js variable on page load; (2) store client time @ page load; (3) use setinterval update time (every 1000 milliseconds or want) getting current client time minus client time @ page load offset of server time @ page load. (obviously go wrong if user updates pc clock while page running, how many users that? , end of world if did?)

if want actual server time every second - why? seems bit of waste of bandwidth little if benefit, if must use ajax suggested. if you're not familiar ajax i'd suggest using google find tutorials - if use jquery can couple of lines of code. easy.

or put onscreen clock in iframe repeatedly reloads itself. because miss days of iframes.