ITCS210 Project additional details and function.
- Function: instantTourData()
    INSIDE FILE: Information.php
    This function deals with showing a planning tour data associated with the form validation as drop-down list by using the following additional features,
	- PHP
	- Database with MySQL
	- Interactive PHP and MySQL with AJAX
	
	- Please See Database: PlanningTourData.

    The operations concept are as follow,
	
	- A user select the desiring date of our planning tour data from the drop-down list.
	
	Inside Information.php: 
	- Each choices in the drop-down list are assigned a value as a string date.	
	- Use the event onchange to invoke the sub function showTour(value) for the tag <select>.
	- Please See Function: showTour(value).

- Function: showTour(value) 
    INSIDE FILE: Information.php
    The sub function inside the function instantTourData().
	
	The operations concept are as follow,
	
	Inside Information.php:
	- This function has one parameter to check the value that corresponds to the specific form select choice.
	- If the passed value is not empty then the AJAX system will create the XMLHttpRequest object to send request for php file from the server.
	- Use GET request and then send this request.
	- Use method "open" for this GET request and also use "q" variable to attach the drop-down list value along with the request.
	
	Inside TourData.php (REQUESTED PHP FILE):
	- This file will be implemented with "mysqli_connect()" function to connect to the MySQL database for retrieving the last update tour data,
	and match the variable "q" with the attribute "Date" to store the matched records in an array.
	- Then print a contents in this array in the html table form.
	- Send this data back to the Information.php.
	
	Inside Information.php (back to the showTour(value) function again):
	- Check whether the state and the status of the server is proper or not, if yes, invoke the AUTOMATIC function 
	(Note that the automatic function comes from the onreadystatechange common syntax) 
	to deal with the received data which is the responseText, and it will be printed in the provided area of some specific tag like tag "div".
	
- Database: PlanningTourData.
    Details: We will store the planning tour data as entity in the MySQL database, its attributes may be as follow,
	    1. "Place" as a string variable.
		2. "Date" as a string variable.
		3. "Duration" as a string variable. 
		4. "Price" as as double variable.
	Each records in the entity is the planning tour data.	
    And then we may update, delete, or insert the tour data randomly.