xxxxxxxxxx<html><head><meta charset="utf-8"><title>W3Cschool教程(w3cschool.cn)</title></head><body><p id="demo">单击按钮显示修改后的年月日。</p><button onclick="myFunction()">点我</button><script>function myFunction(){ var d = new Date(); d.setFullYear(2020,10,3); var x = document.getElementById("demo"); x.innerHTML=d;}</script><p>记住JavaScript月数是从0至11。10是11月。</p></body></html>