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:高三学子心理调节的黄金法则 下一篇:高三生,请别踏进这些误区!!! '; }