请教个问题,关于jquery 函数赋值

Question

$(document).ready(function(){
$("#addtoresv").click( function() {
$.post("/data/ajaxforclass",
   {dealtype: 'r'},
     function(data){
  if(data){ var cookiestr = data; }else{ var cookiestr = ""; }
   }); alert(cookiestr);
         });
});请问如何可以alert出cookiestr的值？

Answer 1

$(document).ready(function(){
    $("#addtoresv").click( function() {
        var cookiestr;
        $.post("/data/ajaxforclass",
          {dealtype: 'r'},
            function(data){
              if(data){ cookiestr = data; }else{ cookiestr = ""; }
          });        alert(cookiestr);
         });
});

Answer 2

$(document).ready(function(){
    $("#addtoresv").click( function() {
        $.post("/data/ajaxforclass",
          {dealtype: 'r'},
            function(data){
              if(data){ var cookiestr = data; }else{ var cookiestr = ""; }
alert(cookiestr);
          });        
         });
});

Answer 3

$(function(){
    $("#addtoresv").click( function() {
        $.post("/data/ajaxforclass",
          {dealtype: 'r'},
            function(data){
              var cookiestr;
              if(data){  cookiestr= data; }else{cookiestr = ""; }
              alert(cookiestr);
          });        
         });
});

Answer 4

//放在函数中alert
$(function(){
    $("#addtoresv").click( function() {
        $.post("/data/ajaxforclass",
          {dealtype: 'r'},
            function(data){
              var cookiestr;
              if(data){  cookiestr= data; }else{cookiestr = ""; }
              alert(cookiestr);
          });        
         });
});