built-in function javaScript
1.Date: Date Functions
Properties:
constructor of the object is established repair function reference
prototype can be added to the object properties and methods
Methods:
The first few days (0-6) getDay () returns the week
getYear () Returns the year before 2000 2, 2000 (including) later to four.
GetFullYear () returns the full four digits of the year
getMonth ( ) returns the number of the month (0-11)
getDate () returns the day (1-31)
returns the number of hours getHours () (0-23)
getMinutes () returns the minutes (0-59)
getSeconds () returns the number of seconds (0-59 )
getMilliseconds () returns the milliseconds (0-999)
getUTCDay () according to international week is now time to get a few (0-6)
getUTCFullYear () to lose the full year based on inter-state time
getUTCMonth () to get the month according to universal time ( 0-11)
getUTCDate () according to universal time lost days (1-31)
getUTCHours () according to universal time lost hours (0-23)
getUTCMinutes () according to time and from inter-state owned minute (0-59)
getUTCSeconds () returns the seconds according to universal time (0-59)
getUTCMilliseconds () returns the milliseconds according to universal time (0-999)
getTime () visit in January 1970 from No. 10: 0: 0 to now come together to spend a few milliseconds
getTimezoneoffset time zone settings () to return the time zone difference happens, they Greenway uniform random time (GMT) to take full original operation in which the calculating machine Difference between the number of minutes)
parse (dateString) Date string is returned since January 1, 1970 00:00:00 milliseconds
setYear (yearInt) set the year .2 or 4 digits
setFullYear (yearInt) set the year .4-digit
setMonth (monthInt) set up to put the month (0-11)
setDate (dateInt) set the day (1-31)
setHours (hourInt) set the number (0-23) hours
setMinutes (minInt) set the number (0-59) minutes
setSeconds (secInt ) put a set number of seconds (0-59)
setMilliseconds (milliInt) set put milliseconds (0-999)
setUTCFullYear (yearInt) to set the time according to the international Year
setUTCMonth (monthInt) according to universal time to set the month (0-11)
setUTCDate (dateInt ) set the date according to universal time (1-31)
setUTCHours (hourInt) to set the hour according to universal time
setUTCMinutes (minInt) according to universal time to set the minutes
setUTCSeconds (secInt) according to universal time set seconds
setUTCMilliseconds (milliInt) based on inter-state time to set the millisecond
setTime (timeInt) set since January 1, 1970 start time. milliseconds
toGMTString () according to the Greenwich Time Date arbitrary changes to the image of the date (a numerical value) into a string GMT time, such as: Weds, 15 June L997 14:02:02 GMT
toUTCString () based on a universal time Date object date is converted to a string
toLocaleString () the date (a numerical value) a date object changes into a string, where the use of a specific date calculating machine configured to use the pattern
the toSource () show the source code object
toString () to convert the date object string
UTC (yyyy, mm, dd, hh, mm, ss, msec) to return to the time scale from the chaos Greenaway means prescribed time gap, double-milliseconds
valueOf () returns the date of the initial value of the object of the present 2.Math : mathematical functions
Attributes:
Function constructor of the set target reference
prototype may for properties and methods as participation
E European push constant quality, naturally on the top number (approximately 2.718)
of natural logarithm of LN2 2 is (approximately equal to 0.693)
LN10 10 of natural logarithm (approximately equal to 2.302)
LOG2E log 2 as the top of e. (approximately equal to 1.442)
LOG10E 10 logarithm of e top (approximately equal to 0.434)
value of PI Π (about ie 3.14159)
SQRT1_2 1/2 (0.5) the square root of (l then divided by the square root of 2, i.e. is about o.707)
the square root of 2 SQRT2 (about 1.414)
方法:
abs(x) 返回数字的相对值
acos(x) 返回数字的反余弦值
asin(x) 返回数字的反正弦值
atan(x) 返回位于-PI/2 和 PI/2 的反正切值
atan2(y,x) 前往（x,y）位于 -PI 到 PI 之间的角度
ceil(x) 返回 x 四舍五入后的最大整数
cos(x) 前往一个数字的余弦值
exp(x) 返回 E^x 值
floor(x) 返回 x 四舍五入后的最小整数
log(x) 返回底数为E的自然对数
max(x,y) 返回 x 和 y 之间较大的数
min(x,y) 返回 x 和 y 之间较小的数
pow(x,y) 返回 y^x 的值
random() 返回位于 0 到 1 之间的随机函数
round(x) 四舍五进后与整
sin(x) 返回数字的正弦值
sqrt(x) 返回数字的平方根
tan(x) 返回一个角度的正切值
toSource() 显示对象的流代码
valueOf() 返回数教对象的本初值
3.Number
属性:
MAX_VALUE The largest possible value a number in JavaScript can have 1.7976931348623157E+308
MIN_VALUE The smallest possible value a number in JavaScript can have 5E-324
NaN Equal to a value that is not a number.
NEGATIVE_INFINITY A value that is less than MIN_VALUE.
POSOTIVE_INFINITY A value that is greater than MAX_VALUE.
prototype A static property of the Number object
方法:
toString Returns a string representing the specified object
valueOf() 返回数教对象的本初值
4.Boolean
属性:
constructor 所树立对象的函数参考
prototype 可以为对象参加的属性和方式
方法:
toSource() 显示对象的流代码
toString() 将布我值转换为字符串,并且返回成果
valueOf() 返回布我对象的原始值
5.String ：字符函数
属性:
constructor 所树立对象的函数参考
prototype 可以为对于象参加的属性和方式
length 返回字符串的字符长度
方法:
anchor("name")用来把字符串转换为HTML锚面标志内(<A NAME=>)
big() 把字符串中的文本变成大字体(<BIG>)
blink() 把字符串中的文本变成闪耀字体(<BLINK>)
bold() 把字符串中的文本变成乌字体(<B>)
fixed() 把字符串中的文本变成流动间距字体,便电报情势(<TT>)
fontcolor(color)设置字符串中文本的色彩(<FONT COLOR=>)
Fontsize(size) 把字符串中的文本变成指定大小(<FONTSIZE=>)
italics() 把字符串中的白原变成斜字体(<I>)
Link(url)用来把字符串转换-HTML链交标志中(<A HREF=>)
small() 把字符串中的文本变成小字体(<SMALL>)
strike() 把字符串中的文本变成划掉字体(<STRIKE>)
sub() 把字符串中的文本变成下标(subscript)字体((SUB>)
sup() 把字符串中的文本变成上标(superscript)字体(<SUP>)
charAt(index) 返回指定索引处的字符
charCodeAt(index)返回一个整数,该整数表现String对象中指定位置处的字符的Unicode编码
concat(string2)衔接两条或少条字符串
fromCharCode(num1, num2, …,BB霜, numN)获取指定的Unicode值并返回字符串
indexOf(searchString, startIndex) 返回字符串中第一个呈现指定字符串的地位
lastlndexOf(searchString, startIndex) 返回字符串中最后一个呈现指定字符串的地位
match(regex) 在字符串中查觅指定值
replace(regex, newString)将字符串中的某些字符替代成其它字符
search(regex) 针对某施行值对字符串入止查觅
slice(startIndex, endIndex)将部门字符抽出并在新的字符串中返回剩余局部
split(delimiter)将字符串分配为数组
substr(startIndex, length) 从startIndex与,取length个字符
substring(startIndex, endIndex) 从startIndex和endIndex之间的字符,没有包含endIndex
toLowerCase() 把字符串中的文本变成小写
toUpperCase() 把字符串中的白本变成大写
toSource() 显示对象的源代码
valueOf() 返回字符串对象的原始值
6.Array ：数组函数
属性:
constructor 所修立对象的函数参考
prototype 能够为对象加入的属性和方法
index For an array created by a regular expression match, the zero-based index of the match in the string.
input For an array created by a regular expression match, reflects the original string against which the regular expression was matched.
length 获取数组元素的个数,即最大下标加1
方法:
concat(array1,arrayn)将两个或两个以上的数组值衔接止来,合并后返回成果
join(string) 将数组中元素合并为字符串,十月妈咪,string为分隔符.如省详参数则直交合并,不再分隔
pop() 移除数组中的最后一个元素并返回当元素
push(value) 在数组的终尾加上一个或多个元素,并且返回新的数组长度值
reverse() 倒置数组中元素的次序,反背排列
shift() 移除数组中的第一个元素并返回当元素
slice(start, deleteCount, [item1[, item2[,...[,itemN]]]]) 返从一个数组中移除一个或少个元素,假如必要,在所移除元素的地位上拔出新元素,返回所移除的元素
sort(compare Function) 在已指定排序号的情形下,依照元素的字女次序排列,假如不是字符串类型则转换成字符串再排序,返回排序后的数组
splice() 为数组删除并加加新的元素
toSource() 显示对象的源代码
toString() 将数组一切元素返回一个字符串,其间用逗号分隔
unshift(value)为数组的开端部门加上一个或者少个元荤,并且返回当数组的新长度
valueOf() 返回数组对象的原始值
7.RegExp
属性:
$1, ..., $9 Parenthesized substring matches, if any.
$_ See input.
$* See multiline.
$& See lastMatch.
$+ See lastParen.
$` See leftContext.
$' See rightContext.
global Whether or not to test the regular expression against all possible matches in a string, or only against the first.
ignoreCase Whether or not to ignore case while attempting a match in a string.
input The string against which a regular expression is matched.
lastIndex The index at which to start the next match.
lastMatch The last matched characters.
lastParen The last parenthesized substring match, if any.
leftContext The substring preceding the most recent match.
multiline Whether or not to search in strings across multiple lines.
rightContext The substring following the most recent match.
source The text of the pattern.
方法:
compile Compiles a regular expression object.
exec Executes a search for a match in its string parameter.
test Tests for a match in its string parameter
8.Function
属性:
arguments An array corresponding to the arguments passed to a function.
arity Indicates the number of arguments expected by the function.
caller Specifies which function called the current function.
prototype Allows the addition of properties to a Function object.
方法:
toString Returns a string representing the specified object.
9.Object
属性:
constructor Specifies the function that creates an object's prototype.
prototype Allows the addition of properties to all objects.
方法:
eval Evaluates a string of JavaScript code in the context of the specified object.
toString Returns a string representing the specified object.
unwatch Removes a watchpoint from a 属性流 the object.
valueOf Returns the primitive value of the specified object.
watch Adds a watchpoint to a 属性源 the object.
10.齐局
属性:
Infinity 指定一个正负无限大的数值
NaN 指定一个 “非数字” 值
undefined 指订一个已被赋值的变质
方法:
decodeURI() 为加稀的URI入止解码
decodeURIComponent() 为加稀的URI组件解码
encodeURI() 将字符串加密为URI
encodeURIComponent() 将字符串加稀为URI组件
escape(string) 加密一个字符串
() 使用escape()对一个字符串入止解码
eval_r(string) 断定一个字符串并将其以足本代码的情势施行
isFinite(number) 检测一个值能否为一个有限数字,返回True或False
isNaN(string) 检测一个值能否没有是一个有限数字
Number() 将一个对象的值转换为一个数字
parseFloat(string) 将一个字符串解析为一个浮面数字
parseInt(string) 将一个字符串解析为一个整数,没有是四舍五进操做,而是切尾
String(object) 将一个对象值转换为一个字符串
number(object)
11.事情
属性:
a.窗心事件,只在body和frameset元素中才有效
onload 页里或者图片加载完成时
onunload 用户分开页里时
b.表双元素事情,正在表双元素中才有效
onchange 框内容转变时
onsubmit 点打降接按钮时
onreset 沉新点击鼠标按键时
onselect 白原被挑选时
onblur 元素失来焦点时
onfocus 该元素获与焦面时
c.键盘事情,在base,bdo,br,frame,frameset,head,html,iframe,meta,param,script,style,title元素里皆无效
onkeydown 按下键盘按键时
onkeypress 按下或按住键盘按键时
onkeyup 搁启键盘按键时
d.正在base,bdo,br,frame,frameset,head,html,iframe,meta,param,script,style,title元荤里皆无效
onclick 鼠标点打一个对象时
ondblclick 鼠标双打一个对象时
onmousedown 鼠本被按下时
onmousemove 鼠标被挪动时
onmouseout 鼠本分开元荤时
onmouseover 鼠标经由元素时
onmouseup 开释鼠本按键时
e.其他
onresize 该窗心或者框架被沉新订义尺寸时
onabort 图片下载被挨续时
onerror 该加载文档或图片时产生过错时
自定义对象:有始始化对象和定义结构函数的对象两类方法
a：始始化对象
例如： 对象={属性1:值1;属性2:值2;......属性n:值n} 注意:每个属性/值对之间用分号隔启；
b： 定义结构函数的对象
例如:
function 函数实(属性1, 属性2,......属性N){
this.属性1=属性值1;
this.属性2=属性值2;
this.属性n=属性值n;
this.方法名1=函数名1;
this.方法实2=函数实2;
}