时间获取、验证、比较的js（格式如：2009-10-11）

//获取时间
function GetDateString() {
    var oDate = new Date();
    var month = oDate.getMonth() + 1;
    if (month <= 9) {
        month = "0" + month;
    }
    var day = oDate.getDate();
    if (day <= 9) {
        day = "0" + day;
    }
    var sDate = oDate.getYear() + "-" + month + "-" + day;
    return sDate;
}

//验证时间格式
function checkDate(theDate){
  var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})/; 
  var result=true;
  if(!reg.test(theDate))
    result = false;
  else{
    var arr_hd=theDate.split("-");
    var dateTmp;
    dateTmp= new Date(arr_hd[0],parseFloat(arr_hd[1])-1,parseFloat(arr_hd[2]));
    if(dateTmp.getFullYear()!=parseFloat(arr_hd[0])
       || dateTmp.getMonth()!=parseFloat(arr_hd[1]) -1
        || dateTmp.getDate()!=parseFloat(arr_hd[2])){
        result = false;
    }
  }
  return result;
}

//时间之间的比较
function compareDate(DateOne,DateTwo)
{
    var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ("-"));
    var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ("-")+1);
    var OneYear = DateOne.substring(0,DateOne.indexOf ("-"));
var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ("-"));
    var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ("-")+1);
    var TwoYear = DateTwo.substring(0,DateTwo.indexOf ("-"));

    if (Date.parse(OneMonth+"/"+OneDay+"/"+OneYear) >
    Date.parse(TwoMonth+"/"+TwoDay+"/"+TwoYear))
    {
      return true;
    }
}