<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<script src="jquery-3.1.0.js"></script>
<script type="text/javascript">
function myFunction(){
setTimeout(function () { $( "#foo" ).trigger( "click" ); }, 5000);
} /* 5000 milisaniye, yani 5 saniye sonra otomatik tetikler */
</script>
</head>
<body onload="myFunction()">
<form action="action_page.php">
Veri:<br>
<input type="text">
<br> <br>
<input type="submit" value="Gonder" id="foo">
</form>
</body>
</html>