Mac 它是苹果公司自1984年起以“Macintosh”开始开发的个人消费型计算机工具/原料电脑方法/步骤1$(function(){    varcountNum=0;  //post请求，查询一共有多少页数据  $.post(\"countNum\",function(data){      countNum=data;   $(\'#ul\').append(\'Pre\')   for(vari=1;i0&&whocountNum){           page=countNum;           now=page;         }else{           page=who;           now=who;         }       }       if(who==countNum+1){         if(countNum>now){           page=now+1;           now=page;         }         if(countNum