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JavaScript? ?? ?? ???, ??, ??, ?? ? ?????.

JavaScript?? ??? ??? ???? ?? ??????.

JavaScript ??? ?? ?-? ??? ??? ???? ?? ??? ??? ?????.

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??? ???? JavaScript ??? ???? ??? ? ????:

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>php中文網(wǎng)(php.cn)</title> 
<script language="JavaScript">
        var person = new Object();
     person.name="kevin";
     person.age=31;
     alert(person.name);
     alert(person["age"])
</script>
</head>
<body>
</body>
</html>

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"JavaScript ??? ??? ???????"?? ?? ? ????.

??? ??? ????? "JavaScript ??? ?-? ?? ????"? ?????.

?-? ?? ????? ?? : ??? ?????(?? ?? ???? ?????).

JavaScript ??? ?-? ?? ?? ?? ????? ???.

JavaScript ??? ?? ??? ???????.

?? ?-? ? ??? ??? ?????.

PHP ??? ?? ?? Python? ?? ??? C ??? ?? ??? Java? ?? ? Ruby ? Perl? ?? ???

JavaScript ??? ??? ????. ?? ??? ?? ??? ??? ???? ????? ??? ? ????.

var Xiaoming = {
name: '???'

};
xiaoming.age // undefine

xiaoming.age = 18; // ?? ?? ??

xiaoming.age; // 18

delete Xiaoming.age; // ?? ?? ??

xiaoming.age; Xiaoming['name']; // ?? ?? ??

xiaoming.name; // undefine

delete Xiaoming.school; // ???? ?? ?? ?? ??


?? ???

??? ???? ??? ???? ??? ???? ?????.

?? ???? ()? ???? (???) ?????.

? ????? person ??? fullName() ???? ??????.

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>php中文網(wǎng)(php.cn)</title> 
</head>
<body>
<p id="demo"></p>
<script>
var person = {
    firstName: "Tom",
    lastName : "Jay",
    id : 666,
    fullName : function() 
      {
       return this.firstName + " and " + this.lastName;
    }
};
      document.getElementById("demo").innerHTML = person.fullName();
</script>
</body>
</html>

?? ??? ???

?? ??? ???? ?? ???? ??? ? ????.

methodName : function() { ?? ?? }

?? ??? ???? ?? ???? ???? ? ????.

objectName.methodName()

????? fullName()? person ??? ????? fullName? ?????.

JavaScript ??? ??, ?? ? ???? ???? ?? ??? ????.

??? ???? ??, ??, ???? ??? ?????.



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||
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>php中文網(wǎng)(php.cn)</title> </head> <body> <script> function Person(name,age,job) { this.name=name; this.age=age; this.job=job; 　　this.friends=["Jams","Martin"]; } Person.prototype.sayFriends=function() { alert(this.friends); }; var person1 = new Person("kevin",31,"SE"); var person2 = new Person("Tom",30,"SE"); person1.friends.push("Joe"); person1.sayFriends();//Jams,Martin,Joe person2.sayFriends();//Jams,Martin </script> </body> </html>