Можно менять на своё число полезный код

                        
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function fulltime () { 

var time=new Date(); 

var newYear=new Date("01,01,2015,00:00:00"); 

var totalRemains=(newYear.getTime()-time.getTime()); 

if (totalRemains>1){ 

var RemainsSec = (parseInt(totalRemains/1000)); 

var RemainsFullDays=(parseInt(RemainsSec/(24*60*60))); 

var secInLastDay=RemainsSec-RemainsFullDays*24*3600; 

var RemainsFullHours=(parseInt(secInLastDay/3600)); 

if (RemainsFullHours<10){RemainsFullHours="0"+RemainsFullHours}; 

var secInLastHour=secInLastDay-RemainsFullHours*3600; 

var RemainsMinutes=(parseInt(secInLastHour/60)); 

if (RemainsMinutes<10){RemainsMinutes="0"+RemainsMinutes}; 

var lastSec=secInLastHour-RemainsMinutes*60; 

if (lastSec<10){lastSec="0"+lastSec}; 

document.getElementById("RemainsFullDays").innerHTML=RemainsFullDays+"<span id='Rem'></span>"; 

document.getElementById("RemainsFullHours").innerHTML=RemainsFullHours+"<span id='Rem'></span>"; 

document.getElementById("RemainsMinutes").innerHTML=RemainsMinutes+"<span id='Rem'></span>"; 

document.getElementById("lastSec").innerHTML=lastSec+"<span id='Rem'></span>"; <!-- highslide start --> 

setTimeout('fulltime()',10)  

} 

else{ 

document.getElementById("clock").innerHTML="С новым годом! :)"; 

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} 

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</style> 

<div id='clockall'>

<div id='clou_xs'> 

<div class='nav1'><img src='/style/icons/fav.gif' alt='o'/> <b><font color='orange'>До нового 2o15 года осталось:</b></font><br>

<font color='#1E90FF'><b><span id='RemainsFullDays'></span></b> Дн,</font> <font color='#4169E1'><b><span id='RemainsFullHours'></span></b> Час,</font> <font color='#0000FF'><b><span id='RemainsMinutes'></span></b> Мин,</font> <font color='#0000CD'><b><span id='lastSec'></span></b> c.</font>  

<script type="text/javascript">fulltime();</script>  

</div> 

</div>