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:11-12学年高一语文必修3同步练习 下一篇:2012高三语文一轮复习课件与测试汇总 '; }