var month = '4'; // 1 through 12 or '*' within the next month, '0' for the current month
var day = '4';   // day of month or + day offset
var dow = 7;     // day of week sun=1 sat=7 or 0 for whatever day it falls on
var hour = 20;    // 0 through 23 for the hour of the day
var tz = -4;     // offset in hours from UTC to your timezone
var lab = 'cd';  // id of the entry on the page where the counter is to be inserted

function start() {
displayCountdown(setCountdown(month,day,hour,tz),lab);
}

loaded(lab,start);
var pageLoaded = 0; window.onload = function() {pageLoaded = 1;}
function loaded(i,f) {if (document.getElementById && document.getElementById(i) != null) f(); else if (!pageLoaded) setTimeout('loaded(\''+i+'\','+f+')',100);
}

function setCountdown(month,day,hour,tz) {
var m = month;
 if (month=='*') m = 0;
  var c = setC(m,day,hour,tz);
 if (month == '*' && c < 0)  
c = setC('*',day,hour,tz);
 return c;
} 

function setC(month,day,hour,tz) {
var toDate = new Date();
if (day.substr(0,1) == '+') {
var day1 = parseInt(day.substr(1));
toDate.setDate(toDate.getDate()+day1);
} 
else{toDate.setDate(day);
}
if (month == '*')
toDate.setMonth(toDate.getMonth() + 1);
else if (month > 0) {
 if (month <= toDate.getMonth())
toDate.setFullYear(toDate.getFullYear() + 1);
toDate.setMonth(month-1);
}
if (dow >0) toDate.setDate(toDate.getDate()+(dow-1-toDate.getDay())%7);
toDate.setHours(hour);
toDate.setMinutes(0-(tz*60));
toDate.setSeconds(0);
var fromDate = new Date();
fromDate.setMinutes(fromDate.getMinutes() + fromDate.getTimezoneOffset());
var diffDate = new Date(0);diffDate.setMilliseconds(toDate - fromDate);
return Math.floor(diffDate.valueOf()/1000);
}

function displayCountdown(countdn,cd) {
if (countdn < 0) 
document.getElementById(cd).innerHTML = "Sorry, you are too late.";
 else {
var secs = countdn % 60;
 if (secs < 10) 
secs = '0'+secs;
var countdn1 = (countdn - secs) / 60;
var mins = countdn1 % 60;

countdn1 = (countdn1 - mins) / 60;
var hours = countdn1 % 24;
var days = (countdn1 - hours) / 24;
document.getElementById(cd).innerHTML = days+' days | '+hours+' hours | '+mins+' mins | '+secs+' seconds ';
setTimeout('displayCountdown('+(countdn-1)+',\''+cd+'\');',999);
}
}