Help with Java Script

[johnburn]

Try this:

<script type="text/javascript">
var now=new Date()

//Enter the Anniversary's MONTH (1-12) and DAY (1-31):
var then=new Date(now.getFullYear(), 8, 18)

var th = now.getFullYear() - 2000 // 11th anniversary on 2011

var monthtext=new Array("Jan","Feb","Mar","April","May","June","July","Aug","Sep","Oct","Nov","Dec")
then.setMonth(then.getMonth()-1) //change to 0-11 month format
var showdate="("+monthtext[then.getMonth()]+" "+then.getDate()+")" //show date of Anniversary

var one_day=1000*60*60*24
var calculatediff=""

calculatediff=Math.ceil((then.getTime()-now.getTime())/(one_day))
if (calculatediff<0){
var nextyearnow=new Date()
nextyearnow.setFullYear(now.getFullYear()+1)
calculatediff=Math.ceil((nextyearnow.getTime()-now.getTime())/(one_day)+calculatediff)
th += 1
}

var beforeAnniversaryText="day's Until " + th + "th Anniversary"
var onAnniversarytext="Today is Anniversary. Hooray :D"
//Display message accordingly
var pluraldayornot=(calculatediff==1)? "day" : "days"
if (calculatediff>0)
    document.write("<b>"+calculatediff+" "+pluraldayornot+" "+beforeAnniversaryText+" "+showdate+"!</b>")
else if (calculatediff==0)
    document.write("<b>"+onAnniversarytext+" "+showdate+"!</b>")

</script>