怎么把这段js代码转换成jquery代码

Question

functionalertSet(e){
document.getElementById("js-alert-box").style.display="block",
document.getElementById("js-alert-head").innerHTML=e;
vart=20,
n=document.getElementById("js-sec-circle");
document.getElementById("js-sec-text").innerHTML=t,
setInterval(function(){
if(0==t){
location.href="http://www.jq-school.com";
}else{
t-=1,
document.getElementById("js-sec-text").innerHTML=t;
vare=Math.round(t/20*735);
n.style.strokeDashoffset=e-735
}
},
970);
}