var script = 'script/access.php';

var args = '';

args += '?url=' + document.URL;
args += '&ref=' + document.referrer;
args += '&sw=' + screen.width;
args += '&sh=' + screen.height;
args += '&js=' + true;
// <img> 
document.write('<img width="0" height="0" src="' + script + args + '" style="visibility:hidden;">');