working out the age. Help needed urgently!

[DamSexy]

This is just simple stuff I know, but I need help with it please. As you can see below I have asked for the DOB to be entered, but how do I get it to work out the persons age from their DOB to todays date?

var canvas;
canvas = openGraphics();

var phrase;
phrase = "Your name:";

var phrase2;
phrase2 = "Your Date of birth:";

var phrase3;
phrase3 = "Your mobile number:";

var phrase4;
phrase4 = "your email address:";

var name;
name = prompt("Please enter your name");

var DOB;
DOB = prompt("Please enter your date of birth DD/MM/YY");

var mobile;
mobile = prompt("Please enter your mobile number");

var email;
email = prompt("Please enter your email address");

var message;
message = phrase + name;

var message2;
message2 = phrase2 + DOB;

var message3;
message3 = phrase3 + mobile;

var message4;
message4 = phrase4 + email;

canvas.drawString( message, 10, 10);

canvas.drawString( message2, 10, 30);

canvas.drawString( message3, 10, 50);

canvas.drawString( message4, 10, 70);

canvas.paint();

[acoder]

Use

var today = new Date();

then see this page to see how you can use the Date object,

[mrhoo]

DOB = prompt("Please enter your date of birth DD/MM/YY",'');

try{
    var D=DOB.split(/\W+/);
    for(var i=0;i<3;i++){
        D[i]=Number(D[i]);
    }
    --D[1];
    var age= new Date()- new Date(D[2],D[1],D[0]);
    age= Math.floor(age/3.15576e10);
}
catch(er){
    DOB = prompt("Enter digits for the day, month and year, separated by / characters",'');
}

[acoder]

MrHoo, let me guess, 3.15576e10 is the number of seconds in a millennium, right?

[mrhoo]

MrHoo, let me guess, 3.15576e10 is the number of seconds in a millennium, right?

Yes, but it is also the number of milliseconds in 365.25 days:
1000*60*60*24*365.25=31557600000

[acoder]

Yes, but it is also the number of milliseconds in 365.25 days:
1000*60*60*24*365.25=31557600000

Aah, that makes more sense. Thanks.