Jquery注意事项(扩展和ajax)

1.扩展:
[javascript]
$(document).ready(function(){ 
    var aa={"uname":"dd","uage":19,"show":function(){alert(1);}}; 
    var bb=$.extend({},aa,{"usex":"男","uname":"bb"});//相当于继承父类aa 
//  var bb=$.extend({},{"usex":"男","uname":"bb"},aa);//aa放后面则把前面的覆盖了 
    alert(aa.uname+"  "+bb.uage+"  "+bb.uname); 
}); 

[javascript]
var settings = { validate: false, limit: 5, name: "foo" }; 
var options = { validate: true, name: "bar" }; 
jQuery.extend(settings, options); 
结果:
settings == { validate: true, limit: 5, name: "bar" }

2.Ajax:

java代码:
[java]
response.setContentType("text/html"); 
PrintWriter out = response.getWriter(); 
String name=request.getParameter("uname"); 
String location=request.getParameter("location"); 
System.out.println(name+"   "+location); 
        String str="{/"users/":[{/"uname/":/"zs/",/"age/":1},{/"uname/":/"bb/",/"age/":5}]}"; 
String str="{'users':[{'uname':'zs','age':1},{'uname':'bb','age':5}]}"; 
str=str.replaceAll("'", "/""); 
out.print(str); 
jquery代码:
[javascript]
$(document).ready(function(){ 
        $("div").bind("click",{"age":20},function(){ 
            $.ajax({ 
                url: "/MyJs/MyTestServlet", 
                type:"GET", 
                data: "uname=John&location=Boston", 
                dataType:"json", 
                success:function(msg){ 
                    alert(msg.users[0].uname); 
                } 
            }); 
    }); 
}); 
3.
[javascript]
// var json=[{"name":"aa","age":18},{"name":"ab","age":19}]; 
// alert($(json)[0].age); 

摘自 洋洋的专栏