function getAjax(ajaxfile, infos, asynch) {
	// This is a small AJAX function
	if ((asynch == "") || (asynch == null))
    {
        asynch = false;
    }
	var xhr_object = null;

    if(window.XMLHttpRequest) // Firefox
	{
    	xhr_object = new XMLHttpRequest();
	}
    else if(window.ActiveXObject) // Internet Explorer
	{
    	xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	}
    else // XMLHttpRequest non support? par le navigateur
    {
		alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
		return false;
	}
	data_url = ajaxfile; // Le lien relatif vers le php
	xhr_object.open("POST", data_url, asynch);
	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	if (infos == "")
    {
		xhr_object.send(null);
	}
    else
    {
		xhr_object.send(infos);
	}
	if (xhr_object.readyState == 4)
    {
		return xhr_object.responseText;
	}
}