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JavaScript

function strDateTime1(str){
var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/;
var r = str.match(reg);
if(r==null)return false;
var d= new Date(r[1], r[3]-1,r[4]);
var newStr=d.getFullYear()+r[2]+(d.getMonth()+1)+r[2]+d.getDate()
return newStr==str
}
//alert(strDateTime("2002-1-31"))
//alert(strDateTime("2002-1-41"))
function strDateTime2(str){
var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/;
var r = str.match(reg);
if(r==null)return false;
var d= new Date(r[1], r[3]-1,r[4],r[5],r[6],r[7]);
var newStr=d.getFullYear()+r[2]+(d.getMonth()+1)+r[2]+d.getDate()+" "+d.getHours()+":"+d.getMinutes()+":"+d.getSeconds()
return newStr==str
}
//alert(strDateTime("2002-1-31 12:34:56"))
//alert(strDateTime("2001-2-29 12:54:56"))
//alert(strDateTime("2002-1-41 12:00:00"))
var s="2002-4-16"
//alert(chkDate(s));
function chkDate3(sDate){
var r=/\d{4}(?:-\d{1,2}){0,2}/
//正则表达式判断是否为yyyy-mm-dd,yyyy-mm,yyyy格式
if(sDate.match(r)==sDate){
 var arr=sDate.split("-")
 switch(arr.length){
 //根据不同的yyyy-mm-dd,yyyy-mm格式判断年月日数字是否正确
  case 3:
  var tmpDate=new Date(arr[0],arr[1],arr[2]);
  if(tmpDate.getMonth()==arr[1] && tmpDate.getFullYear()==arr[0]) return true;
  break;
  case 2:
  if(arr[1]<13) return true;
  break;
  default:
  return false;
 }
}
return false;
}
/*
时间有效性判断函数
All by happywinds
*/
function verifyDate(textObj)
{
  var str=textObj;
textObj = textObj.replace(/\s+/g,"");
  if(str.search(/^\d{4}-\d{1,2}-\d{1,2}$/) == 0)
  {
  var y = parseInt(str.split("-")[0]);
   var m = parseInt(str.split("-")[1]);
   var d = parseInt(str.split("-")[2]);
  switch(m)
  {
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    case 12:
    if(d>31)
    {
     return false;
   }
   else
   {
     return true;
   }
    break;
  case 2:
    if((y%4==0 && d>29) || ((y%4!=0 && d>28)))
    {
     return false;
   }  
   else
   {
     return true;
   }
    break;
    case 4:
    case 6:
    case 9:
    case 11:
    if(d>30)
    {
     return false;
   }
   else
   {
     return true;
   }
    break;
  default:
    return false;
  }
}
else
{
   return false;
}
}
//+---------------------------------------------------
//| 取得当前日期所在月的最大天数
//+---------------------------------------------------
function getDaysInMonth(year,month)
{
month = parseInt(month,10)+1;
var temp = new Date(year+"/"+month+"/0");
return temp.getDate();
}