JavaScript countdown timer: Calculate how many seconds until midnight EST -

i'm using 24 hour countdown timer runs in javascript. currently, uses seconds base measurement. have 86400 listed here calculate how many seconds left until midnight each day, est (-5). please demonstrate how might define value , insert "time" variable? i've seen other variations of i'm having trouble getting work specific script. thank in advance.

<script type="application/javascript"> var mycountdown1 = new countdown({ time: 86400, // 86400 seconds = 1 day width:200,  height:55,   rangehi:"hour", style:"flip"    // <- no comma on last item! }); </script> 

you can subtract unix timestamp of now, unix timestamp of midnight:

var = new date(); var night = new date(     now.getfullyear(),     now.getmonth(),     now.getdate() + 1, // next day, ...     0, 0, 0 // ...at 00:00:00 hours ); var mstillmidnight = night.gettime() - now.gettime(); var mycountdown1 = new countdown({     time: mstillmidnight / 1000, // divide 1000 ms sec, if function needs seconds here.     width:200,      height:55,       rangehi:"hour",     style:"flip"    // <- no comma on last item! }); 

here set timer takes unix timestamp of midnight, , subtracts unix timestamp of now, result in amount of milliseconds until midnight. amount of milliseconds wait before executing script.