javascript - JavaScriptで生年月日とシステム日付の差を計算する方法

Question

JavaScriptで生年月日とシステム日付の差を計算したい。

JSP および JavaScript で:

'生年月日 '

function currentAge(DateOfBirth){
    //alert(DateOfBirth);
    var date1 = DateOfBirth;
    date1 = document.getElementById("dateOfBirth").value;
    alert(date1);
    var date2 = new Date();
    alert(date2);

    // _Diff=Math.ceil((date2.getTime()-date1.getTime())/(one_day));

    /* var timeDiff = Math.abs(date2.getTime() - date1.getTime());
    var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24));
    //var diffDays = date2.getDate() - date1.getDate();  */
    //alert(_Diff);
}

Answer 1

function dateDiff(dateform) {
date1 = new Date();
date2 = new Date();
diff  = new Date();

date1temp = new Date(dateform.firstdate.value);
date1.setTime(date1temp.getTime());

date2temp = new Date(dateform.seconddate.value);
date2.setTime(date2temp.getTime());
diff.setTime(Math.abs(date1.getTime() - date2.getTime()));

timediff = diff.getTime();
days = Math.floor(timediff / (1000 * 60 * 60 * 24)); 
dateform.difference.value = days;
return false; 
}