function chkdiv(divid){ var chkid=document.getElementById(divid); if(chkid != null){return true; } else {return false; } } if (chkdiv('fy')){ document.getElementById('fy').innerHTML='上一篇:2020高考地理三轮冲刺新课标专用版题型增分练辑 下一篇:2020版新高考地理考前高分突破练京津鲁琼版练习 '; }