请教高手这段jquery代码的意思

Question

  ajaxlist[id] = {
                ajax: null,
                paras: "",
                contents: [],
                reStr: "",
                isXML: isXMLZY,
                xmldoc: null,
                resfun: func
            };
  if (!ajaxlist[id]) {
                return false;
            }
            else {
                return true;
            }

Answer 1

ajaxlist[id] = {//ajaxlist对象是个数组，id对应的索引对象声明
   ajax: null,//ajax属性=null
   paras: "",//同上
   contents: [],
   reStr: "",
   isXML: isXMLZY,
   xmldoc: null,
   resfun: func
   };
   if (!ajaxlist[id]) {如果未声明初始化
   return false;
   }
   else {
   return true;
   }