function openInNewWindow() {
	var startdate = document.getElementById('start-date').value;
	var enddate = document.getElementById('end-date').value;
	var adults = document.getElementById('adults').value;
	//alert(startdate);
	if(startdate == 'checkin'){
		alert("Please select a checkin date");
		return false;
	}
	
	if(enddate == 'checkout'){
		alert("Please select a checkout date");
		return false;
	}
	if(adults == ''){
		alert("Please select a no of adults");
		return false;
	}
	startdatearr = startdate.split('/');
	enddatearr = enddate.split('/');

	var start_date = new Date()

	start_date.setYear(startdatearr[2])
	start_date.setDate(startdatearr[1])
	start_date.setMonth(startdatearr[0] - 1)
		
	// Store the date of the end date
	var end_date = new Date()
	end_date.setYear(enddatearr[2])	
	end_date.setDate(enddatearr[1])
	end_date.setMonth(enddatearr[0] - 1)
	
	// Call the days_between function
	var no_of_nights = days_between(start_date, end_date)
	
	//alert(days_between(startdate,enddate));
	var url ="https://www.phgsecure.com/IBE/bookingRedirect.ashx?propertyCode=DELTI&arrivalDate="+startdate+"&numberOfNights="+no_of_nights+"&numberOfAdults="+adults;
	//alert(url);
	//return false;
	var newWindow = window.open(url, '_blank');
	newWindow.focus();
	return false;
}

function days_between(date1, date2) {

	// The number of milliseconds in one day
	var ONE_DAY = 1000 * 60 * 60 * 24

	// Convert both dates to milliseconds
	var date1_ms = date1.getTime()
	var date2_ms = date2.getTime()

	// Calculate the difference in milliseconds
	var difference_ms = Math.abs(date1_ms - date2_ms)
	
	// Convert back to days and return
	return Math.round(difference_ms/ONE_DAY)

}