function checkBookingForm(what) {
	if (what.name.value == '') {
		alert("Please enter your name");
		what.name.select();
		return false;
	} 
	else if (what.address.value == '') {
		alert("Please enter your address");
		what.address.select();
		return false;
	} 
	else if (what.citytown.value == '') {
		alert("Please enter City / Town");
		what.citytown.select();
		return false;
	} 
	else if (what.postcode.value == '') {
		alert("Please enter your Postcode");
		what.postcode.select();
		return false;
	} 
	else if (what.email.value == '') {
		alert("Please enter your Email Address");
		what.email.select();
		return false;
	} 
	else if (what.phone.value == '') {
		alert("Please enter your Phone Number");
		what.phone.select();
		return false;
	} 
	else if (what.Date_of_Arrival.value == '') {
		alert("Please enter your expected arrival date");
		what.Date_of_Arrival.select();
		return false;
	} 
	else if (what.No_of_nights.value == '') {
		alert("Please enter the duration of your stay");
		what.No_of_nights.select();
		return false;
	} 
	else {
		return true;
	}
}