setTimeout() in javascript and trigger click event

const myTimeout = setTimeout(myGreeting, 5000);

function myGreeting() {
alert('hi');
}


// using jquery 

setTimeout(function() {
   $('.gayabhoja').show();
}, 1500);

<input type='button' name='osx' value='Demo' class='osx demo' runat="server" /> <script>
    $("document").ready(function () {
        window.getElementById("osx").click();
    });
</script>

<script>
  window.addEventListener('load', function () {
  document.getElementById("btn").click();
})
</script>

success: function(data){
  $('#closebtn').trigger('click');
}

$("document").ready(function() {
    $(".donation_wrapper .payment-gateway-wrapper ul li").trigger('click');
});