// JavaScript Document
function checkform(formobj)
{
	var StartDate = formobj.StartDate
	var EndDate = formobj.EndDate
	var RoomNum = formobj.RoomNum
	var GoAhead = formobj.goahead
	
	if (!isDateString(StartDate) || !isDateString(EndDate))
	{
		alert('你必須選擇住房日期及退房日期')
		return false;
	} else if (RoomNum.selectedIndex == 0 ) {
		alert('你必須選預定房數')	
		return false;
	} else {
		return true;
	}

}