Ext.onReady(function(){

             //案例一

             /*

             var countries = ['Vietnam', 'Singapore', 'United States', 'Russia'];

             Ext.Array.each(countries, function(name, index, countriesItSelf){

                 console.log(name);

                 if(name == 'Vietnam'){

                     return false;  //停止循环

                 }

             });

             */

             //案例二

             var StudentsJSON = {

                 student:[{

                     name: '张三',

                     studentid: 200801,

                     grade: 80

                 },{

                     name: '李四',

                     studentid: 200802,

                     grade: 90

                 },{

                     name: '王五',

                     studentid: 200803,

                     grade: 90

                 },{

                     name: '李二麻子',

                     studentid: 200804,

                     grade: 90

                 }]

             };  

             Ext.each(StudentsJSON.student, function(student, index, self){

                 console.log(student.name);

                 if(student.studentid == '200802'){

                     return false;

                 }

             });

         });

     </script>