JS Definition Class Object

Defining classes
Way One
function A_class (ARG1,ARG2) {
THIS.ARG1=ARG1;
THIS.ARG2=ARG2;
This.tostring=function () {
Alert (this.arg1+ "" +this.arg2)
}
}
var a_class = new A_class ("AA", "BB");
A_class.tostring ();

Way Two
function B_class (ARG1,ARG2) {
THIS.ARG1=ARG1;
THIS.ARG2=ARG2;
}

b_class.prototype={
Constructor:b_class,
Print:function () {
Alert (this.arg1+ "" +this.arg2);
}
}
var b_class = new B_class ("11", "22");
B_class.print ();

Mode three

function C_class (ARG1,ARG2) {
THIS.ARG1=ARG1;
THIS.ARG2=ARG2;
}

C_class.prototype.output=function () {
Alert (this.arg1+ "" +this.arg2);
}
var c_class = new C_class ("@@", "# #");
C_class.output ();

JS Definition Class Object