日期:2014-05-16 浏览次数:20471 次
<!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>三级联动-年月日</title> <script type="text/javascript" scr="getDates.js"> </script> </head> <body> <select name="year" onchange="initDate()"> <script type="text/javascript"> var year=new Date().getFullYear();//在 FF等浏览器内getYear()返回的是 "当前年份-1900" 的值 for(var i = year - 30;i <= year + 30; i++){ document.write("<option value=" + i + ">" + i + "</option>"); } </script> </select> <select name="month" onchange="initDate()"> <script type="text/javascript"> for(var i = 1; i <= 12; i++){ document.write("<option value=" + i + ">" + i + "</option>"); } </script> </select> <select name="day"> <script type="text/javascript"> for(var i = 1; i <= 31; i++){ document.write("<option value=" + i + ">" + i + "</option>"); } </script> </select> </body> </html>
getDates.js
function append(o,v){ var option=new Option(v,v); o.options.add(option); } function initDate(){ var y = document.getElementsByName("year")[0].value; var m = document.getElementsByName("month")[0].value; var day=document.getElementsByName("day")[0]; day.innerHTML=""; if(m==1 || m==3 || m==5 || m==7 || m==8 || m==10 || m==12){ for(var j = 1; j <= 31; j++){ append(day,j); } } else if(m==4 || m==6 || m==9 || m==11){ for(var j = 1; j <= 30; j++){ append(day,j); } } else if(m == 2){ var flag = (y % 4 == 0)&& (y % 100 != 0) || (y % 400 == 0); if(flag){ for(var j = 1; j <= 29; j++){ append(day,j); } } else{ for(var j = 1;j <= 28; j++){ append(day,j); } } } }