Resig Class Prototype

class-prototype.js

// makeClass - By John Resig (MIT Licensed)
function makeClass(){
  return function(args){
    if ( this instanceof arguments.callee ) {
      if ( typeof this.init == "function" )
        this.init.apply( this, args.callee ? args : arguments );
    } else
      return new arguments.callee( arguments );
  };
}

var User = makeClass();
User.prototype.init = function(first, last){
  this.name = first + " " + last;
};
var user = User("John", "Resig");
user.name
// => "John Resig"