function make_js_cnx(){
	var request = false;
	try {
		request = new ActiveXObject('Msxml2.XMLHTTP');
        }
     catch (err2) {
	 	try {
			request = new ActiveXObject('Microsoft.XMLHTTP');
            }
		catch (err3) {
			try {
				request = new XMLHttpRequest();
				}
		catch (err1) {
			request = false;
			}
		}
	}
    return request;
	}