<!--


function isEmpty(s)


{ return ((s == null) || (s.length == 0)); }


function isSpace(c)


{ return ((c == "\n") || (c == " ") || (c == "\b") || (c == "\t")); }


function isWhiteSpace(s)


{


  for(i=0; i<s.length; i++)


    if(!isSpace(s.charAt(i))) return false;


  return true;


}


function warning(f,s)


{


  f.focus();


  f.select();


  alert(s);


  return false;


}


function isEmail(email)


{


  if(isEmpty(email)) return false;


  if(isWhiteSpace(email)) return false;


  invalidChars = " /:,;";


  for(i=0; i<invalidChars.length; i++)


  {


    badChar = invalidChars.charAt(i);


    if(email.indexOf(badChar,0) > -1) return false; 


  }


  atPos = email.indexOf("@",1);


  if(atPos == -1) return false; 


  if(email.indexOf("@",atPos+1) > -1) return false; 


  periodPos = email.indexOf(".",atPos);


  if(periodPos == -1) return false; 


  if(periodPos+3 > email.length) return false; 


  return true;


}


function isValidContactForm(fm)


{


  TheFirst = fm.firstname.value;


  TheLast = fm.lastname.value;


  TheAddress = fm.address.value;


  ThePhone = fm.phone.value;  


  TheCity = fm.city.value;


  TheEmail = fm.email.value;


  Thefindus = fm.findus.value;


  TheComments = fm.comments.value;


  if(isEmpty(TheFirst))


    return (warning(fm.firstname,"Please enter your first name."));


  if(isEmpty(TheLast))


    return (warning(fm.lastname,"Please enter your last name."));


  if(isEmpty(TheAddress))


    return (warning(fm.address,"Please enter your address."));	


  if(isEmpty(TheCity))


    return (warning(fm.city,"Please enter your city."));	


  if(!isEmail(TheEmail))


    return (warning(fm.email,"Email address is empty or invalid"));


  if(isEmpty(Thefindus))


    return (warning(fm.findus,"How you find us?"));


  if(isEmpty(TheComments))


    return (warning(fm.comments,"Please give us your comments."));


  return true;


}


//-->