第161页 SINGLETON BUILT-IN OBJECTS

The Global Object

URI-Encoding Methods

encodeURI() &  encodeURIComponent() 比如：

var uri = “http://www.wrox.com/illegal value.htm#start”;
                    
//”http://www.wrox.com/illegal%20value.htm#start”
alert(encodeURI(uri));
                    
//”http%3A%2F%2Fhttp://www.wrox.com%2Fillegal%20value.htm%23start”
alert(encodeURIComponent(uri));

反运算：
decodeURI() & decodeURIComponent() 比如：

var uri = “http%3A%2F%2Fhttp://www.wrox.com%2Fillegal%20value.htm%23start”;
                    
//http%3A%2F%2Fhttp://www.wrox.com%2Fillegal value.htm%23start
alert(decodeURI(uri));
                    
//http://www.wrox.com/illegal value.htm#start
alert(decodeURIComponent(uri));

eval()方法:相当于js的解释器与执行器。

eval(“alert(‘hi’)”); //相当于：alert("hi");

var msg = “hello world”;
eval(“alert(msg)”);    //”hello world”

eval(“function sayHi() { alert(‘hi’); }”);
sayHi();

eval(“var msg = ‘hello world’;”);
alert(msg);  //”hello world”

Global Object Properties

PROPERTY DESCRIPTION
undefined The special value undefined
NaN The special value NaN
Infinity The special value Infinity
Object Constructor for Object
Array Constructor for Array
Function Constructor for Function
Boolean Constructor for Boolean
String Constructor for String
Number Constructor for Number
Date Constructor for Date
RegExp Constructor for RegExp
Error Constructor for Error
EvalError Constructor for EvalError
RangeError Constructor for RangeError
ReferenceError Constructor for ReferenceError
SyntaxError Constructor for SyntaxError
TypeError Constructor for TypeError
URIError Constructor for URIError

The Window Object