Phone Number and Credit Card Number Validation

[Dr Octogonapus]

Hello i'm doing javascript validation on my form and I don't know how to do phone number validation so it only has numbers and single spaces allowed and also credit card validation which I want it to display between 13 and 18 numbers and single spaces.

Javascript:

<script type="text/javascript">
 
function validateForm()
 
{
 
    var x=document.forms["checkout_details"]["firstname"].value;
 
    if (x==null || x=="")
 
    {
 
        alert("Please fill out your First Name");
 
        return false;
 
    }
 
   
 
    var x=document.forms["checkout_details"]["lastname"].value;
 
    if (x==null || x=="")
 
    {
 
        alert("Please fill out your Last Name");
 
        return false;
 
    }
 
   
 
    var x=document.forms["checkout_details"]["address"].value;
 
    if (x==null || x=="")
 
    {
 
        alert("Please fill out your Address");
 
        return false;
 
    }
 
   
 
    var x=document.forms["checkout_details"]["email"].value;
 
    var atpos=x.indexOf("@");
 
    var dotpos=x.lastIndexOf(".");
 
    if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
 
    {
 
        alert("Your Email Address is not valid. Please fill out a valid Email Address");
 
        return false;
 
    }
 
   
 
   
 
}
 
</script>

HTML/PHP:

echo'<form name="checkout_details" action="confirm.php" onsubmit="return validateForm()" method="post">';
 
echo'<font color="red">*</font> <b>First Name:</b> <input type="text" name="firstname"><br /><br />';
 
echo'<font color="red">*</font> <b>Last Name:</b> <input type="text" name="lastname"><br /><br />';
 
echo'<font color="red">*</font> <b>Address:</b> <textarea name="address" rows="4" cols="20"></textarea><br /><br />';
 
echo'<font color="red">*</font> <b>Email Address:</b> <input type="text" name="email"><br /><br />';
 
echo'<font color="red">*</font> <b>Phone Number:</b> <input type="text" name="phone"><br /><br />';
 
echo'<font color="red">*</font> <b>Delivery Method:</b><br />';
 
echo'<input type="radio" name="radio" id="regularpost" checked="true">Regular Post<br />';
 
echo'<input type="radio" name="radio" id="courier">Courier<br />';
 
echo'<input type="radio" name="radio" id="expresscourier">Express Courier<br /><br />';
 
echo'<font color="red">*</font> <b>Please sign me up for the newsletter:</b> <input type="checkbox" name="checkbox"><br /><br />';
 
echo'<input type="submit" value="Purchase">';
 
echo'</form>';

Can anyone please help me out with this? Thankyou.

 

[Rinianne]

Help you with what?

 

[Dr Octogonapus]

How to do the phone number and credit card validation?

I'm not sure how to do it and am in need of the javascript code for those 2 things to finish off my form.

 

[Wabbit]

dude these questions are supposed to be asked on

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