// include as [script language='javascript' src='mailto.js'][/script]

function chksubmit()
{
  mess = "";

  with(document.mailto)
  {
    if (aname.value=="")
      { mess = "Please enter your name"; }
    if (ename.value=="" || !is_email(ename.value))
      { mess = "Please enter your email"; }
    if (eb.value=="")
      { mess = "Please enter your message"; }

    if (mess!="")
      { alert(mess); return(false); }
  }
return(true);
}

function is_email(str)
{
  at = str.indexOf("@");
  dot = str.indexOf(".",at);
  if (dot == -1 || at == -1)
  {
    return( false );
  }
  return( true );
}