06 2012 档案

摘要：程序： 1 function a(){ 2 var a1 = 1, 3 a2 = 2; 4 } 5 var b = new a(); 6 console.log(b.constructor); 7 console.log(b.prototype); 8 console.log(b); 9 b.prototype = {10 a1 : '3',11 a2 : '4'12 }13 console.log(b.constructor);14 console.log(b.prototype);15 console.log(b);运行结果：1 a()2 undef... 阅读全文