代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> </head> <body> <select id="nian" onclick="biantian()"></select>年 <select id="yue" onclick="biantian()"></select>月 <select id="tian"></select>日 <script type="text/javascript"> FillNian(); FillYue(); FillTian(); function FillNian() { var b = new Date(); //获取当前时间 var nian = parseInt(b.getFullYear()); var str = ""; for(var i=nian-5;i<nian+6;i++) { str = str+"<option value='"+i+"'>"+i+"</option>"; } document.getElementById("nian").innerHTML = str; } function FillYue() { var str = ""; for(var i=1;i<13;i++) { str = str+"<option value='"+i+"'>"+i+"</option>"; } document.getElementById("yue").innerHTML = str; } function FillTian() { var yue = document.getElementById("yue").value; var nian = document.getElementById("nian").value; var ts = 31; if(yue==4 || yue==6 || yue==9 || yue==11) { ts=30; } if(yue==2) { if((nian%4==0 && nian%100 != 0) || nian%400==0) { ts = 29; } else { ts = 28; } } var str = ""; for(var i=1;i<ts+1;i++) { str = str+"<option value='"+i+"'>"+i+"</option>"; } document.getElementById("tian").innerHTML = str; } function biantian() { FillTian(); } </script> </body> </html>
结果：
