Javascript constructor Instance Analysis _javascript skill

/*
* (refer to <javascript core>p151)
* @time 2008-11-25
*/

Copy Code code as follows:

No return value
function Test0 () {
This.name= ' test0 ';
}
var test0=new Test0;
Debugger
alert (test0);//output [Object]
alert (test0.name);//Output Test0
Return a String Object
function Test () {
This.name= ' test ';
return new string (' 123 ');//Returns a String object
}
var test=new test ();
alert (test);//Output 123
alert (test.name);//output undefined, indicating that the object created by the constructor is a string object
Return an original type string
function Test2 () {
This.name= ' test2 ';
Return ' 123 ';//returns a String object
}
var test2=new Test2 ();
alert (test2);//output [Object]
alert (test2.name);//Output Test0