date of birth validation

[lolodede]

i like to validate date of birth as format dd/mm/yyy i tried everything but is not working
thank you

[lolodede]

whats wrong with my code

<!--
function Validate(){
var DOB = new Date(document.forms.DOB.value)
if (DOB == "NaN") {
    alert("DOB required in the format DD/MM/YYYY")
    document.forms.DOB.select.focus()
    return false
}
}
//-->
Date of Birth (dd/mm/yyy): <input type="text" name="DOB" size="30" onblur="Validate()" /></p>

[dmjpro]

Show us your code what you tried so far?

[Dormilich]

you test whether the Date object is a string, I doubt it will fire. possibly isNAN() or typeof DOB will get you further

[lolodede]

i used the above code but it didnt work i dont why
i also i want to validate the the radio buttons so i know if user answered both of the questions

function checkForm() {
//This fuction shows that the user need to answer Question one
 
var el = document.forms[0].elements;
for(var i = 0 ; i < el.length ; ++i) {
if(el[i].name == "visites") {
var radiogroup = el[el[i].name];
var itemchecked = false;
for(var j = 0 ; j < radiogroup.length ; ++j) {
if(radiogroup[j].checked) {
itemchecked = true;
break;
}
}
if(!itemchecked) {
alert("Please Answer Question One");
if(el[i].focus)
el[i].focus();
return false;
}
}
}
return true;
}

i used this twice but i dont know how

[dmjpro]

@lolodede
Actually "document.forms" returns Form Collection then how does it work "document.forms.DOB"?

I think when a String is compared with an Object then Object must be converted into String.

[gits]

to your first question: you could use a simple regExp to check the form's value for the correct format:

var s  = '01/01/2009';
var re = /\d{2}\/\d{2}\/\d{4}/;
 
alert(re.test(s))

kind regards

[acoder]

Don't forget the start and end characters:

var re = /^\d{2}\/\d{2}\/\d{4}$/;

[gits]

:) ... yep ... thanks for pointing that out ...

kind regards

[lolodede]

i used reg expression but is not working right i try to alert it but icant do that i dont know why
thanks for help

[gits]

show the code that you have tried.

kind regards

[dmjpro]

Hello all ...What would be my answer ? ;)

[lolodede]

thanks for help its working now