function doValidate()
{
    var re = /^ *$/;
    
    if( re.test(document.contactForm.contactName.value ) )
    {
      alert( "Your Name is a required field" );
      document.contactForm.contactName.focus();
      return false;
    }
    
    if( re.test(document.contactForm.phone.value ) )
    {
      alert( "Phone Number is a required field" );
      document.contactForm.phone.focus();
      return false;
    }
        
    if( re.test(document.contactForm.email.value ) )
    {
      alert( "E-mail is a required field" );
      document.contactForm.email.focus();
      return false;
    }

    var email = /^.+@.+\..{2,3}$/;
    if( !email.test(document.contactForm.email.value ) )
    {
      alert( "Invalid E-mail address" );
      document.contactForm.email.focus();
      return false;
    }

    return true;
}