var school=function (name) {
  this.name=name;
  var classes=new Array();
   this.addClasses=function (cla) {
   classes.push(classe);
   }
   this.getClass=function () {
    return classes;
   }
 }

//班级类
 var classes=function (name) {
  this.name = name;
  var groups = new Array();
  this.addGroup = function (group) {
   groups.push(group);
   return this;
  };
  this.getGroups = function () {
   return groups;
  }
 };

 //组
 var group=function (name) {
  this.name=name;
  var students=new Array();
  var addStudents=function (student) {
   students.push(student);
   return this;
  }
   this.geStudent=function () {
    return students;
   }
 };

 //学生类
  var student=function (name) {
   this.name=name;
   this.gotoClass=function () {
    document.write(name+"：我是学生，我要去上课 ")
   };
   this.finishClass=function () {
    document.write(name+": 终于下课了");
   }
  };

 //学生实例
 var astudent=new student("我是a同学");
 var bstudent=new student("我是b同学");
 var cstudent=new student("我是c同学");
 var dstudent=new student("我是d同学");
 var estudent=new student("我是e同学");
 var fstudent=new student("我是f同学");
 var gstudent=new student("我是g同学");
 var hstudent=new student("我是h同学");
 var istudent=new student("我是i同学");

//班级实例(1)
  var class1=new classes("一班");
  //组1
 var oneOne=new group("一班一组");
  //组中添加学生
 oneOne.addStudents(astudent).addStudents(bstudent);
 //组2
 var oneTwo=new group("一班二组");
 //组中添加学生
 oneTwo.addStudents(cstudent).addStudents(dstudent);

 class1.addGroup(oneOne).addGroup(oneTwo);
 //班级实例2
 var class2=new classes("二班");
 //组1
 var towOne=new group("二班一组");
 //组中添加学生
 towOne.addStudents(estudent).addStudents(fstudent);

 //组2
 var towTwo=new group("二班二组");
 //组中添加学生
 towTwo.addStudents(gstudent).addStudents(hstudent).addStudents(istudent);
 //
 class2.addGroup(towOne).addGroup(towTwo);

 //学校实例
 var usSchool=new school("组合模式学校");

 var classes=usSchool.getClass();//班级
  for(var i=0;i<classes.length;i++){
   if(classes[i].name=="一班"){
    for(var j=0;j<classes[i].getGroups().length;j++){
     if(classes[i].classes[i].getGroups()[j]=="一组"){
      var students=classes[i].classes[i].getGroups()[j].geStudent();
      for(var k=0;k<students.length;k++){
       students[k].gotoClass();
      }
     }
    }
   }
  }