Mode conception ....
<link rel="stylesheet" href="//code.jquery.com/ui/1.13.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://code.jquery.com/jquery-3.6.0.js"></script>
<script src="https://code.jquery.com/ui/1.13.1/jquery-ui.js"></script>

<script type="text/javascript">

function getXhr()
{
			var xhr = null; 
			if(window.XMLHttpRequest) // Firefox et autres
			   xhr = new XMLHttpRequest(); 
			else if(window.ActiveXObject)
			{ // Internet Explorer 
			   try 
			   {
					xhr = new ActiveXObject("Msxml2.XMLHTTP");
			   } 
			   catch (e) 
			   {
					xhr = new ActiveXObject("Microsoft.XMLHTTP");
			   }
			}
			else 
			{ 
				// XMLHttpRequest non supporté par le navigateur 
				alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
				xhr = false; 
			} 

			return xhr;
}

function go()
{
			var xhr = getXhr();
			
			xhr.onreadystatechange = function()
			{
				if(xhr.readyState == 4 && xhr.status == 200)
				{
					response = xhr.responseText;
					alert("gogo");
					// On se sert de innerHTML pour rajouter les options a la liste
					//document.getElementById('souscategorie').innerHTML = leselect;
				}
			}

			//xhr.open("POST","compute_chart_data.php",true);
			//xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
			//xhr.send();
			
			alert("ping");
}



</script>

<button type="button" title="Copie" id="button_copier" onclick="go()"> Graphique </>