Nineth Course Focus (JS statement: Get time, digital value, timer)

"Therelationship between JQ and JS ": JQ is a common method for the encapsulation, simplification and optimization of JS.

" Little Tricks " Ctrl+k+d:vs write code when the format is messy, the shortcut keys used to organize the code

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1. Get Time:

Method	Describe
getFullYear ()	Returns a four-digit year
GetMonth ()	Return month (starting from 0, January =0,2 month =1, ... ）
GetDate ()	Return date (starting from 1, this date)
GetDay ()	Returns the day of the week (Sunday = 0, Monday = 1, ... ）
GetHours ()	Returns the number of hours (starting at 0, the number of hours)
Getminutes ()	Returns the number of minutes (starting at 0, the number of minutes)
Getseconds ()	Returns the number of seconds (starting at 0, the number of seconds)
Getmilliseconds ()	Returns the number of milliseconds (starting at 0, the number of milliseconds)
GetTime ()	Returns the number of milliseconds elapsed from GMT January 1, 1970 0:0 0 seconds (86400000 milliseconds = 1 days)

1) Wording:

function Myclick ()
{
var mydate=new Date ();
Alert (Mydate.getday ());
}

2) Get the number of days between set dates:

var startstr = "2014-4-14" ;; var Startarray = Startstr.split ("-" new Date (Startarray[0], startarray[1]-1, startarray[2]); var endDate = new Date (Endarray[0], endarray[1]-1, Endarray[2var diffdays = (enddate-startdate)/86400000;alert ( DiffDays); </script>      

2. Value:

Maximum value: Math.max (18,12,22,33)

Minimum value: Math.min (18,2,2,3,1)

Round up: Math.ceil (25.9)//It rounds the number up to the nearest integer

Rounding Down: Math.floor (25.6)

Rounding: Math.Round (25.6)

Random number between 0~1: Math.random ()//excluding 0 and 1

Example

Returns an integer between 1~100 including 1 and 100:varinum=math.floor (Math.random () *100+1)

3 window

　　1) Open a window:window.open("http://www.baidu.com", "_blank", "height=300,width=400,top=30,left=140,resizable= Yes ");

Resizable Whether you can resize a new window by dragging the default is Yes

Scrollable whether the new window shows scroll bars default to No

　　2) Close the new window:window.close ()

3) Window.history.go (-1)//browser back one page

Window.history.go//forward one page

4. Timer Instance

1) Print AAAA after 5 seconds:

SetTimeout (function() {    alert ("AAAA");},5000);  

The *settimeout () method is used to call a function or evaluate an expression after a specified number of milliseconds.

Effect: 5 Seconds after the popup box shows AAAA, it does not loop repeatedly.

2) Print the number once every 2 seconds:

var i=0; SetInterval (function() {    i++;    document.write (i);},2000);   

The *setinterval () method invokes a function or evaluates an expression according to the specified period (in milliseconds).

Effect: Every 2 seconds, print 1, 2, 3, 4, 5 ..., see the interface is: 123456789101112 ...

3) Print a number every 2 seconds, until 10:

var i=0;  var timer=setinterval (function() {    i++if (i==10) {clearinterval (timer);} document.write (i) ;},2000);     

The *clearinterval () method cancels the timeout set by SetInterval ().

Effect: Only print until 10, interface: 12345678910

4) Every 1 seconds, print 1 to 10 and return to 1:

 var i=0; var b=true;function () {if (b) {I++if (B==false; if (I==1if (I==10false;} document.write (i);},1000)              

* Note: Stop timer can only use clearinterval () method to stop, with return and so on cannot stop the timer, the timer will persist until clearinterval () appears.

5) Generate 1-100 random integers, give 5 chance to see if you can guess the right:

var Inumber=math.floor (Math.random () *100+1);//Generate a random integer between 1-100 as the winning numberForvar i=1;i<7;i++){if (i==6{alert ("Five chance ran out, winning number is:" +Inumber);Return; }Else{var sinput=prompt ("Please enter an integer between 1-100");var ninput=Number (sInput);if (IsNaN (ninput)) {//Determine if the input is a number alert ("You're not typing a number.")); }Else{if (Ninput=parseint (ninput)) {// judge whether the input is an integer if (ninput>100| | Ninput<1else{if (Ninput> Inumber) {alert ("The content you entered is too large" if (Ninput<inumber) {alert ("The content you entered is too small" ); } else alert ("Congratulations on winning!") "); returnelse{alert ("You are not entering an integer" ); } } }} 

Nineth Course Focus (JS statement: Get time, numeric value, timer)