题目意思是自己定义个json数组对象，然后用$.each遍历显示
$(function(){
var json = [
{"name":"Tom","grade":93},
{"name":"John","grade":90},
{"name":"Jim","grade":89},
{"name":"ha","grade":93},
{"name":"fuck","grade":92},
{"name":"amy","grade":9},
{"name":"Tosm","grade":100}
];
$("#btn").bind('click',function(){
$.each(json,function(index){
$("ul").append("<li>姓名:" + json[index].name + " 成绩:" + json[index].grade + "</li>");
});
});
})
