function newAjax(fichier,param,div){
        var httpRequest = false;

        if (window.XMLHttpRequest) { // Mozilla, Safari,...
            httpRequest = new XMLHttpRequest();
            /*if (httpRequest.overrideMimeType) {
                httpRequest.overrideMimeType('text/xml');
            }*/
        }
        else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            }
            catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                }
                catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Abandon :( Impossible de créer une instance XMLHTTP');
            return false;
        }
		httpRequest.onreadystatechange = function() { parseAjax(httpRequest,div); };
		if(fichier=="/includes/modules/getMix.php") httpRequest.onreadystatechange = function() { parseAjaxMix(httpRequest,div); };
		else if(fichier=="/includes/modules/getDiscographie.php") httpRequest.onreadystatechange = function() { parseAjaxDisco(httpRequest,div); };
        httpRequest.open('POST', fichier, true);
		httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        httpRequest.send(param);
}