JS DOM Manipulation function event

a function

1. String functions

S.tolowercase ();---Variable lowercase

S.touppercase ();---Variable capitalization

S.SUBSTR (2, 8);--intercept starts at index 2, intercepts 8 character lengths

S.split ();--Specifies the character split, returning an array. Put a character in parentheses, divide s by this character

s.length;--length

S.indexof (); --The first occurrence in the string, looking for an index, no return-1.

S.lastindextof (); --Find the first matching index from the back.

2. Time-Date function

var d = Now Date (); --current time, access to the user's computer system time (prone to problems)

var d = Now Date (1999,3,2)-Defines the time, April 2, 1999.

--Define the month minus one.

Get

D.getfullyeat (); --Take the year

D.getmonth ();--Take the month, which is 1 less than the actual month.

D.getdate (); --Take the day

D.getday (); --Take the day of the week

D.gethours (); --Take hours

D.getminutes (); --Take minutes

D.getseconds (); --Take seconds

Set up

D.setfullyear (); --Set year

D.setmonth ();---set the month in the setting is time to note plus 1.

...........

3. Mathematical functions

Math.ceil (); --Take the upper limit

Math.floor (); --Take the lower limit

Math.Round (); --Rounding

Math.random (); --random number, between 0--1

var v = math.random ();

Math.ceil (V*10); --Take 1--10 random number

A. Match (b)--determine if the match

--String A, B to match, if not match returns null

--just determine if the content matches, not the data type.

--"= = =" Three equal signs indicate identity, content type, etc. are equal.

JS DOM Manipulation function event