// JavaScript Document
function monthChanged(year, month, day){
	var syear = document.getElementById(year) ;
	var smonth = document.getElementById(month) ;
	var sday = document.getElementById(day) ;	
	var dates = new Date(syear.value, smonth.value, 0).getDate() ;
	while(sday.options.length < dates)
		sday.options[sday.options.length] = new Option(sday.options.length + 1, sday.options.length + 1) ;
	sday.options.length = dates ;
}
//-->