function login() {
 $dbh->exec("SELECT * FROM users WHERE (email LIKE '".$dbh->quote($_POST["mymail"],PDO::PARAM_STR)."') AND (mypass='".$dbh->quote(SHA1($_POST["mypass"]),PDO::PARAM_STR)."')");
 if( $user=mysql_fetch_array($dbh) ){
  setcookie("loggedin", TRUE, time()+3600);
  setcookie("userid", $user["id"], time()+3600);
  setcookie("name", $user["myuser"], time()+3600);
  setcookie("language", $user["lang"], time()+3600);
  setcookie("background", $user["mybg"], time()+3600);
  setcookie("color", $user["mycolor"], time()+3600);
  setcookie("textcolor", "white", time()+3600);
  echo json_encode("success");
 }else{
  echo json_encode("error");
 }
}