The Book by Availability page shows the property's inventory for a specified date period sort able by all or a single room type. The date period can be advanced or retarded by one period (ie 20 days or 30 days), begun on a different date and the period to display can be shown as 10, 20 ,30 , 45 or 60 days at a time. If more days are chosen than fit the screen, the user is allowed to scroll horizontally to view the additional day. # of Days field on the book by availability screen is a sticky value and the entered value will be remembered and used for the remainder of the user session.
The Availability chart itself shows first the date, then the day of the week, then the total remaining available rooms for that day.. Then on the left are the room types listed in black. The center chart is filled with buttons containing numbers. Each number represents the number of rooms available for that particular day.

Once the first date is selected, the most common scenario would be to select the last date. As long as both selections are of the same type, the system will automatically fill in the rest for you. However, the user is not limited to one room type per booking. The user may select as many days as they want, and as many room types as they want. The rules for determining which rooms are automatically selected become too complex to easily describe in writing, so I will leave the rest up to personal experience. There is one rule left that should be mentioned. If a user selects from the 15^th through the 20^th, but only wants it through the 19^th, the user should depress the 19^th, not the 20^th to deselect the 20^th. This occurs all the way until the first day. To deselect the first day, press the button once more, then the last day of a series will be deselected.
Along the bottom of the selected rooms is a pop up window that contains the selected date range and a New Booking button which takes you to the New Booking window.
Error Checks: The system runs a server side error check to insure that you have assigned a valid date range without interruption. For example you must have selected at least one day and room type and you cannot have select a room for the 18^th and then again for the 20^th, but no room on the 19^th.