js判斷年月日格式是否正確

    function isdate(strDate){
    var strSeparator = "-"; //日期分隔符
    var strDateArray;
    var intYear;
    var intMonth;
    var intDay;
    var boolLeapYear;
    strDateArray = strDate.split(strSeparator);
    if(strDateArray.length!=3) return false;
    intYear = parseInt(strDateArray[0],10);
    intMonth = parseInt(strDateArray[1],10);
    intDay = parseInt(strDateArray[2],10);
    if(isNaN(intYear)||isNaN(intMonth)||isNaN(intDay)) return false;
    if(intMonth>12||intMonth<1) return false;
    if((intMonth==1||intMonth==3||intMonth==5||intMonth==7||intMonth==8||intMonth==10||intMonth==12)&&(intDay>31||intDay<1)) return false;
    if((intMonth==4||intMonth==6||intMonth==9||intMonth==11)&&(intDay>30||intDay<1)) return false;
    if(intMonth==2){
    if(intDay<1) return false;
    boolLeapYear = false;
    if((intYear%100)==0){
    if((intYear%400)==0) boolLeapYear = true;
    }
    else{
    if((intYear%4)==0) boolLeapYear = true;
    }
    if(boolLeapYear){
    if(intDay>29) return false;
    }
    else{
    if(intDay>28) return false;
    }
    }
    return true;
    }