//Variables
    var now = new Date();
    var totalDays = '';
    var totalMonths = '';
    var totalWeeks;
    var birthDate = new Date(document.getElementById('selYear').value, document.getElementById('selMonth').value, document.getElementById('selDay').value);
    var output = '';

//Total Days Old
var totalDays = Math.floor((now - birthDate) / 86400000);

//Total Weeks Old
totalWeeks = totalDays / 7;
totalWeeks = Math.round(totalWeeks);

//Total Months Old
totalMonths = totalDays / 30;



//Total Years
var totalYears = document.getElementById('selYear').value - now.getFullYear();
totalYears = Math.abs(totalYears);




//Outputs
output += 'You are ' + totalDays + ' days old';
output += '<br />You are ' + totalWeeks + ' weeks old';
output += '<br />You are ' + totalMonths + ' months old';
output += '<br />You are ' + totalYears + ' Years old';