function writeDateDropDown() {
	var select_month=new Array("Null", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
	var datenow=new Date();
	var month=datenow.getMonth()+1;
	var year=datenow.getFullYear();
	
	document.write('<select class="book" name="ci_ym" id="ci_ym">');
	
	for(var i=1; i<=13; i++)
	{
		document.write("<option value=\"" + year + "-" + month + "\">" + select_month[month] + "-" + year + "</option>");
		if ( month >= 12 )
		{
			year++;
			month=1;
		} else
		{
			month++;
		}
	}
	
	document.write('</select>');
}

function y2k(number) {
	return (number < 1000) ? number + 1900 : number;
}


function calculateDates() {
	var now = new Date();
	var datetomorrow = new Date( Date.UTC(y2k(now.getYear()),now.getMonth(),now.getDate(),now.getHours(),now.getMinutes(),now.getSeconds()) + 24*60*60*1000);
	var day = datetomorrow.getDate();
	var month = datetomorrow.getMonth()+1;		// starts at 0->jan
	var year = datetomorrow.getFullYear();
	
	document.forms["checkincheckout_ym"].elements["ci_day"].value = day;
	document.forms["checkincheckout_ym"].elements["ci_ym"].value = year + "-" + month;
	document.forms["checkincheckout_ym"].elements["nights"].value = 2;
}