1. Using Built In Objects
Kevin Harville

2. Date() instantiation options:
birthday = new Date();
//returns now
birthday = new Date("June 20, :00:00");
birthday = new Date(6, 20, 2001);
birthday = new Date(6, 20, 2001, 8, 0, 0);
Source: Sams Teach Yourself JavaScript in 24 Hours.

3. Setting a Date object myDay.setDate(4); myDay.setMonth(0);
myDay.setYear(99); //use setFullYear
myDay.setFullYear(1999);
myDay.setHours(23);
myDay.setMinutes(30);
myDay.setSeconds(0);

4. Getting Date Object Info
alert(myDay.getDate());
document.write(myDay.getMonth());
myYear = myDay.getYear(); //use getFullYear
myDay.getFullYear();
myDay.getHours();
myDay.getMinutes();
myDay.getSeconds();

5. Math Math is encapsulated in an object format.
There are things Math can do - methods, and properties of math, such as PI. Math properties never change
Therefore, a function such as raising a number to a power is done via a Math method:
myVar = Math.pow ( 2, 4 );
Don't make your own math object. Use the object, Math, javascript provides.

6. Math Methods Math.random()
returns a random number from zero up to, but not including, one.

7. Math Methods - Rounding
Math.round( myVar )
Math.floor( myVar )
Math.ceil( myVar )

8. Math Methods - Trigonometry
Math.acos(x)
Math.asin(x)
Math.atan(x)
Math.cos(x)
Math.sin(x)
Math.tan(x)
IMPORTANT - THESE CALCULATIONS ARE DONE IN RADIANS. A SIMPLE BUT NECESSARY CONVERSION FROM RADIANS TO DEGREES NEEDED.

9. Math Minimum / Maximum
Math.max ( valA, valB )
Math.min ( valA, valB)

10. Math Powers and Roots
Math.pow ( num, pwr )
Math.sqrt ( 25 )

11. Other Math Methods
Other Math methods exist. Consult your reference materials when doing higher math.

12. Math Properties Math.E Math.PI Math.LN2 Math.LN10 Math.LOG2E
Math.SQRT1_2
Math.SQRT2
The Math object's properties are Math constants.
The only Math property I want you to know for this class is Math.PI

13. Browser Objects

14. Document Object Model window location document history anchors [ ]
links [ ]
forms [ ]
images [ ]
elements [ ]

15. Things you can do with DOM
Refer to document properties
Clear a document
Refer to and modify specific anchors and links.
Move to and refer to previous and next pages.
Move to a specific new page

16. Things you can do... You can do much more.
The details in this chapter were only briefly covered.
Read Chapters 9 and 10.
All this is done by using the Document Object Model and object-oriented programming.