给wordpress加一个网站运行时长代码

<div  align="center"><span id="runtime_span"></span></div>
<script type="text/javascript">function show_runtime(){window.setTimeout("show_runtime()",1000);X=new
Date("01/19/2024 5:22:00");
Y=new Date();T=(Y.getTime()-X.getTime());M=24*60*60*1000;
a=T/M;A=Math.floor(a);b=(a-A)*24;B=Math.floor(b);c=(b-B)*60;C=Math.floor((b-B)*60);D=Math.floor((c-C)*60);
runtime_span.innerHTML="本站勉强运行: "+A+"天"+B+"小时"+C+"分"+D+"秒"}show_runtime();</script>