Javascript constructor instance analysis

/*
* (Refer to <JavaScript core> p151)
* @ Time 2008-11-25
*/ CopyCodeThe Code is 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 ('20140901'); // returns a String object.
}
VaR test = new test ();
Alert (TEST); // output 123
Alert (test. Name); // output undefined, indicating that the object created by a constructor is a string object.
// Return a string of the original type
Function Test2 (){
This. Name = 'test2 ';
Return '20140901'; // returns a String object.
}
VaR Test2 = new Test2 ();
Alert (Test2); // output [object]
Alert (test2.name); // output test0