Calculate The Number Of Days, Months Or Years Between Two Dates Using Javascript

<html>
<head>
<title> Calculate The Number Of Days, Months Or Years Between Two Dates Using Javascript </title>
</head>
<body>
<div> Date of Birth <input type="text" id="DOB" name="DOB" placeholder="dd/mm/yyyy "></input> <br/> Current Date<input type="text" name="Date" id="Date" placeholder="dd/mm/yyyy"></input> <br/> <button type="Button" onclick="age()">Calculate</button >
</div>
</body>
<script type="text/javascript">
function age() {
debugger;
var birthdate = document.getElementById('DOB').value; // in "dd/MM/yyyy" format
var senddate = document.getElementById('Date').value; // in "dd/MM/yyyy" format
var x = birthdate.split("/");
var y = senddate.split("/");
var bdays = x[0];
var bmonths = x[1];
var byear = x[2];
//alert(bdays);
var sdays = y[0];
var smonths = y[1];
var syear = y[2];
//alert(sdays);
if (sdays < bdays) {
sdays = parseInt(sdays) + 30;
smonths = parseInt(smonths) - 1;
//alert(sdays);
var fdays = sdays - bdays;
//alert(fdays);
}
else {
var fdays = sdays - bdays;
}
if (smonths < bmonths) {
smonths = parseInt(smonths) + 12;
syear = syear - 1;
var fmonths = smonths - bmonths;
}
else {
var fmonths = smonths - bmonths;
}
var fyear = syear - byear;
alert(fyear + ' years ' + fmonths + ' months ' + fdays + ' days');
}
</script>
</html>// This is just a sample script. Paste your real code (javascript or HTML) here.
if ('this_is'==/an_example/){of_beautifier();}else{var a=b?(c%d):e[f];}