定义js数组的方式有：
var arr = (); var arr = []; var arr = new Array();
如何拼接成一个json字段。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <TITLE> obj TO JSON Demo </TITLE> <META NAME="Generator" CONTENT="EditPlus"> <META NAME="Author" CONTENT=""> <META NAME="Keywords" CONTENT=""> <META NAME="Description" CONTENT=""> </HEAD> <SCRIPT type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></SCRIPT> <script type="text/javascript" src="js/jquery.json-2.4.min.js"></script> <BODY> <h2>利用jquery-json将js对象转化为JSON床</h2> <INPUT TYPE="button" VALUE="生成JSON串" ONCLICK="" id="testBut"><br/> <div id="showDiv" style="display:none"> <div> </BODY> <script type="text/javascript"> function student(sid,name,age,classInfo){ this.sid=sid; this.name=name; this.aeg=age; this.classInfo=classInfo; } function classInfo(classname,teacher){ this.classname=classname; this.teacher=teacher; } $(function(){ $("#testBut").click(function(){ var students = new Array(); arry = new classInfo('三年级一班','项正伟'); students[0]=new student(2014001,'蔡子旭',23,arry); students[1]=new student(2014002,'张苞',24,arry); students[2]=new student(2014003,'张颌',33,arry); var jsonStr=$.toJSON(students); $("#showDiv").show(); $("#showDiv").text(jsonStr); }); }); </script> </HTML>