Send Button Custom Message/Alert

sendbutton.php

<?php

function my_admin_head() {
	?>

	<script type="text/javascript">
	jQuery(document).ready(function() {
		jQuery('#sendbutton').on('click', function(event) {
			alert('the send/queue button was clicked');
		});
	});	
	</script>

	<?php
}

add_action('admin_head', 'my_admin_head', 10, 1);

?>