Problem with comparing dates in javascript
<p>HI,</p>

<p>I have the following code that is supposed to compare two dates:</p>

<pre><code> var d = ($('#day').val());
 var m = ($('#month').val() -1);
 var y = $('#year').val(); 
 var birthdate = new Date(y,m,d);
 alert('birthdate is' + birthdate);
 var today = new Date();
 alert('today is'+ today); 
 var diff = (today - birthdate);
 years = Math.floor(diff/(1000*60*60*24*365));
 alert(years);
</code></pre>

<p>It's basically working but I'm interested to see if the date of birth makes the user over 18 or not. So I've tried to put in 30th march 1993 - which would make the user 17. I'm alerting out the birthdate and it gives me back the correct date (mon mar 29 1993 00:00:00 GMT + 0100 BST)....however this is evaluating to 18 (alert(years) in the above code) when it should evaluate to seventeen. It's not until I put in 3rd April 1993 that it evaluates to 17.</p>

<p>Any ideas?   </p>
