function mygetFullYear(d) { 
 yr = d.getYear();
 if (yr < 1000)
  yr+=1900;
 return yr;
}
function daysleft() {
 today = new Date();
 targetdate = new Date("May 1, "+mygetFullYear(today)); // countdown = 0 on the day before this date
 milliseconds = (24 * 60 * 60 * 1000);
 remaining = ((targetdate.getTime() - today.getTime()) / milliseconds); 
 return Math.round(remaining);
}
document.write(daysleft() );