<!-- //
function checkmail() 
{ 
  txt=document.mailform.mail.value; 
  name=document.mailform.fio.value;
  if (txt == "") { 
  alert("Enter your e-mail address, please!"); 
  return(false); 
  } else if (txt.indexOf(".") == -1) { 
  alert("Enter a valid e-mail, please!"); 
  return(false); 
  } else if (txt.indexOf("@") == -1){
  alert("Enter a valid e-mail, please");
  return(false);
  } else if (name == "") {
  alert("Enter your name, please");
  return(false);
  }
return(true);  
} 

//-->