function chkTheForm()
{
validRegExp = /^[0-9 - +().]/;

 if(document.TheForm.Name.value == "") {
   alert("Please enter your name!");
   document.TheForm.Name.focus();
   return false;
  }
   if(document.TheForm.Telefon.value == "") {
   alert("Please enter your phone number !");
   document.TheForm.Telefon.focus();
   return false;
  }

    if (document.TheForm.Telefon.value.search(validRegExp) == -1) 
   {
      alert('This is no valid international phone number!\nPlease enter contry code, area code and number like this:\n+12 12.. 123456...');
      return false;
	  }
}



// Dank an Stefan Münz ! www.teamone.de