function goDecode(){
  var y=document.getElementById('dy').value.trim();
  var m=document.getElementById('dm').value.trim();
  var d=document.getElementById('dd').value.trim();
  if(!y||!m||!d){alert('请输入完整的出生年月日');return;}
  location.href='pages/decode.html?y='+encodeURIComponent(y)+'&m='+encodeURIComponent(m)+'&d='+encodeURIComponent(d);
}
['dy','dm','dd'].forEach(function(id){
  var el=document.getElementById(id);
  if(!el) return;
  el.addEventListener('keydown',function(e){
    if(e.key==='Enter')goDecode();
  });
});