使用相关payload插进js中，浏览器报错:TypeError: $.ajax is not a function

[hackfox666]

插入的相关js代码为
var h,f="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",d="=";function p(e){var t,n,i="",jk="";for(t=0;t+3<=e.length;t+=3)n=parseInt(e.substring(t,t+3),16),i+=f.charAt(n>>6)+f.charAt(63&n);t+1==e.length?(n=parseInt(e.substring(t,t+1),16),i+=f.charAt(n<<2)):t+2==e.length&&(n=parseInt(e.substring(t,t+2),16),i+=f.charAt(n>>2)+f.charAt((3&n)<<4));while((3&i.length)>0)i+=d; jk=i; try{$.ajax({type:"POST",url:"http://127.0.0.1:28080/REQUEST",data:jk,async:false,success:function(resultdata){jk=resultdata}}); } catch (error){ console.error(error); }return i}

浏览器报错太多了，js不太熟，师傅能提供些解决思路吗？