Extjs

         Student = function (config) {
             this.name = config.name;
             this.sex = config.sex;
         }

         Ext.onReady(function () {

             var student = new Student({name:"jzy",sex:"Y"});

             var info = String.format("name:{0} sex:{1}", student.name, student.sex);

             alert(info);
         });

         Student = function (config) {
             Ext.apply(this,config);
         }

         Ext.onReady(function () {

             var student = new Student({ name: "jzy", sex: "Y" });

             var info = String.format("name:{0} sex:{1}", student.name, student.sex);

             alert(info);
         });