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:2019高考数学(理)冲刺大题提分(讲义+练习)大题精做 下一篇:2019高考语文冲刺大题提分(讲义+练习)大题精做 ';
}