AS3 validate form fields?

Question

Hi,

I wrote a AS3 script, i have 2 fields to validate, i.e email and name.

For email i use:

function isValidEmail(Email:String):Boolean { var emailExpression:RegExp = /^[a-z][\w.-]+@\w[\w.-]+.[\w.-]*[a-z][a-z]$/i; return emailExpression.test(Email); }

How about name field? Can you show me some sample code?

EDIT:

Invalid are:

• blank

• between 4 - 20 characters

• Alphanumeric only(special characters not allowed)

• Must start with alphabet

Answer 1

I think you probably want a function like this:

function isNameValid(firstname:String):Boolean
{
    var nameEx:RegExp = /^([a-zA-Z])([ \u00c0-\u01ffa-zA-Z']){4,20}+$/;
    return nameEx.test(firstname);
}

Rundown of that regular expression:

• [a-zA-Z] - Checks if first char is a normal letter.
• [ \u00c0-\u01ffa-zA-Z'] - Checks if all other chars are unicode characters or a space. So names like "Mc'Neelan" will work.
• {4,20} - Makes sure the name is between 4 and 20 chars in length.

You can remove the space at the start of the middle part if you don't want spaces.

Hope this helps. here are my references:

• Regular expression validate name asp.net using RegularExpressionValidator
• Java - Regular Expressions: Validate Name