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To access the contents, click the chapter and section titles.
Platinum Edition Using HTML 4, XML, and Java 1.2
(Publisher: Macmillan Computer Publishing)
Author(s): Eric Ladd
ISBN: 078971759x
Publication Date: 11/01/98
Table 19.10 shows some of the methods of the Date object.
| Table 19.10 HTML Date Object Methods
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| Property
| What It Does
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| getYear()
| returns the year
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| getMonth()
| returns the month
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| getDate()
| returns the day of the month
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| getDay()
| returns the day of the week
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| getHours()
| returns the hours
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| getMinutes()
| returns the minutes
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| getSeconds()
| returns the seconds
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| getTime()
| returns the number of milliseconds since January 1970 00:00:00
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| getTimezoneOffset()
| returns the number of hours of time zone offset from GMT in the current location
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| setYear(arg)
| sets the year to arg
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| setMonth(arg)
| sets the month to arg
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| setDate(arg)
| sets the day of the month to arg
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| setHours(arg)
| sets the hours to arg
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| setMinutes(arg)
| sets the minutes to arg
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| setSeconds(arg)
| sets the seconds to arg
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| setTime(arg)
| sets the number of milliseconds since January 1970 00:00:00 to arg
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| toGMTString()
| returns a string representation of the date in GMT
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| toLocalString()
| returns a string representation of the date in the local time zone
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Using the Math Object
JavaScript’s Math object gives you access to various mathematical constants and functions. These are represented as properties and methods of the Math object. Table 19.11 shows the properties.
| Table 19.11 HTML Math Object Properties
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| Property
| What It Does
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| E
| returns the constant e
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| LN2
| returns the natural logarithm of 2
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| LN10
| returns the natural logarithm of 10
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| LOG2E
| returns the base-10 logarithm of e
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| LOG10E
| returns the base-2 logarithm of e
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| PI
| returns the constant pi
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| SQRT1_2
| returns the square root of 1/2
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| SQRT2
| returns the square root of 2
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Table 19.12 shows the Math object methods, which are the different functions that you can use.
| Table 19.12 HTML Math Object Methods
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| Method
| What It Does
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| abs(x)
| absolute value of x
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| acos(x)
| arc cosine of x
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| asin(x)
| arc sine of x
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| atan(x)
| arc tangent of x
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| atan2(x,y)
| arc tangent of x,y
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| ceil(x)
| x rounded up to the nearest integer
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| cos(x)
| cosine of x
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| exp(x)
| e raised to the x power
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| floor(x)
| x rounded down to the nearest integer
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| log(x)
| logarithm of x
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| max(x,y)
| maximum of x and y
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| min(x,y)
| minimum of x and y
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| pow(x,y)
| x raised to the y power
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| random()
| returns a random number
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| round(x)
| x rounded to the nearest integer
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| sin(x)
| sine of x
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| sqrt(x)
| square root of x
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| tan(x)
| tangent of x
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