cuenta regresiva

<img src="AQUI VA LA URL DE TU IMAGEN" width="277" height="46">
<form name="count">
<input name="count2" size="42" type="text"/>
</form>
<script>

var before="AQUI EL NOMBRE DEL EVENTO"
var current="HOY ES(EVENTO)!"
var montharray=new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec")
function countdown(yr,m,d){
theyear=yr;themonth=m;theday=d
var today=new Date()
var todayy=today.getYear()
if (todayy < 1000)
todayy+=1900
var todaym=today.getMonth()
var todayd=today.getDate()
var todayh=today.getHours()
var todaymin=today.getMinutes()
var todaysec=today.getSeconds()
var todaystring=montharray[todaym]+" "+todayd+", "+todayy+" "+todayh+":"+todaymin+":"+todaysec
futurestring=montharray[m-1]+" "+d+", "+yr
dd=Date.parse(futurestring)-Date.parse(todaystring)
dday=Math.floor(dd/(60*60*1000*24)*1)
dhour=Math.floor((dd%(60*60*1000*24))/(60*60*1000)*1)
dmin=Math.floor(((dd%(60*60*1000*24))%(60*60*1000))/(60*1000)*1)
dsec=Math.floor((((dd%(60*60*1000*24))%(60*60*1000))%(60*1000))/1000*1)
if(dday==0&&dhour==0&&dmin==0&&dsec==1){
document.forms.count.count2.value=current
return
}
else
document.forms.count.count2.value=" "+dday+ " días, "+dhour+" hrs, "+dmin+" min, y "+dsec+" seg "
setTimeout("countdown(theyear,themonth,theday)",1000)
}
//enter the count down date using the format year/month/day
countdown(2008,05,09,)
</script>