JavaScript Objects and properties

1. Create an empty object: var o =new object ();

2. Create Object Direct Quantity:

var cricle={x:0,y:0,radius:2}
var homer={
　　name:"Homer Simpson",
　　age:34,
　　married:true,
　　email:"zzy@163.com"
}

3 Settings and queries for properties

var book=new object();
book.title="测试";
alert(book,title);
A property is created by assigning a value to a new property of an object. Although variables are often declared with keyword VAR, declaring object properties is not necessary.

Enumeration of attributes: For/in loops provide a way to traverse object properties

function displayppName(obj)
{
　var name="";
　for(var name in obj)
　　name+=name+"\n"
　　alert(name);
}