function validateFBFormOnSubmit(form_field)
{		
        
    var regExp_name = /^[A-Za-z][A-Za-z\s'-]{2,35}$/;
    var regExp_comment = /^[\w\W\s]{3,10000}$/;
    var regExp_email = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;

    if (!regExp_name.test(form_field.fb_name.value))
    {
        alert("Please enter your name. (Between 2 and 30 characters)")
        form_field.fb_name.focus()
        form_field.fb_name.select()
        return false
    }

    if (!regExp_email.test(form_field.fb_email.value))
    {
        alert("Please enter your Email Address. (Your 'Email Address' must contain the following characters:- @ .)")
        form_field.fb_email.focus()
        form_field.fb_email.select()
        return false
    }

    if (!regExp_comment.test(form_field.fb_comment.value))
    {
        alert("Please enter your comments. (Between 3 and 10000 characters)")
        form_field.fb_comment.focus()
        form_field.fb_comment.select()
        return false
    }

    return true;

}