JS Basic function

Time:

var time = new Date (); Get current time

var year = Time.getfullyear (); Year

var month = Time.getmouth () +1; Month

var day = Time.getday (); Weeks

var today = Time.getdate ();

Alert (XX); Can be directly output time

Mathematical functions:

var sx = Math.floor (); Take the whole number of parts

var sx = Math.ceil (); Take a decimal part

var sx = Math.Round (); Rounded

var sx = Math.max (x,x); Take maximum value

var rand = Math.random (); Defining a random array

Rand2 = parseint (RAND * 4)//rounding

var arr = [' 0 ', ' 1 ', ' 2 ', ' 3 ']; Convert to 1234

String:

var str = ' ABCDEFG ';

var index = str.indexof (' C '); Find the index value of the first C

var chars = Str.charat ();

var lastindex = str.lastindexof (' C '); Find the index value of the last C

Str.substring (1,3); Output BC

Str.substr (1,3); Starting from 1, the number of three, BCD

Str.replace (' abc ', ' 123 '); 123 instead of ABC, output 123

var up_str = Str.touppercase (); Convert to uppercase

Str.tolowcase ()//convert to lowercase

JS Basic function