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:周末“禁补令”为何在郑州遇尴尬 下一篇:2012高一英语学案:外研版必修3 '; }