1.定义基本格式
2.keyAndValue用:链接
var person ={"name":"张三", age:23,'gender':true};
获取name的值
方式1 : var name = person.name;
方式2 : var name = person["name"];// alert(name);//alert(person);2.嵌套格式 {}———>[]
key:字符串persons
value:[]内的数据
[]中又嵌套了三个Json数据
var persons ={"persons":[{"name":"张三","age":23,"gender":true},{"name":"李四","age":24,"gender":true},{"name":"王五","age":25,"gender":false}]};// alert(persons);
获取王五值
var name1 = persons.persons[2].name;// alert(name1);3.嵌套格式 []———>{}[]为数组,数组中嵌套jsonvar ps =[{"name":"张三","age":23,"gender":true},{"name":"李四","age":24,"gender":true},{"name":"王五","age":25,"gender":false}];//获取李四值//alert(ps);alert(ps[1].name);
创建函数,方式一
var fun1 new Function("a", "b", "alert(a);")
fun1(1, 2);
这种方式用的及其的少创建函数,方式二
var fun2 function(a,b){document.write("Result is (sum) :" (ab))
}
fun2(2,3);创建…
创建一个空的数组
var arr1 new Array(); document.write(“This is a arr1 :” (arr1) “”);
创建一个带参数的数组
var arr2 new Array(1,2,3,4,5); document.write(“This is a arr2 :” (arr2) “”);
创建一个长度为5的数组
var arr3 new Array(5); document…