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高考历史刷题1+1(2019模拟题)讲练课件+试卷 下一篇:2020高考地理刷题1+1(2019模拟题)讲练课件+试卷 '; }