var screenW = 0, screenH = 0;
if (parseInt(navigator.appVersion)>3) {
 screenW = screen.width;
 screenH = screen.height;
} else if (navigator.appName == "Netscape" && parseInt(navigator.appVersion)==3 && navigator.javaEnabled() ) {
 var jToolkit = java.awt.Toolkit.getDefaultToolkit();
 var jScreenSize = jToolkit.getScreenSize();
 screenW = jScreenSize.width;
 screenH = jScreenSize.height;
}
var xhr = null;
if(window.XMLHttpRequest) xhr = new XMLHttpRequest();
else if(window.ActiveXObject) {  
  try { xhr = new ActiveXObject('Msxml2.XMLHTTP'); }
  catch (e) { xhr = new ActiveXObject('Microsoft.XMLHTTP'); }
} else {
  xhr = false; 
}
xhr.open('POST','stat.php',true);
xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=iso-8859-1');
xhr.send('W='+screenW+'&H='+screenH);