function thecao() {
  document.querySelector('#thecao').scrollIntoView({behavior: 'smooth'});
}
function menhgia() {
  document.querySelector('#menhgia').scrollIntoView({behavior: 'smooth'});
}
function thanhtoan() {
  document.querySelector('#pay').scrollIntoView({behavior: 'smooth'});
}
function idgame() {
  document.querySelector('#idgame').scrollIntoView({behavior: 'smooth'});
}