function screenSize(w)
{
var winW = 0;

if (parseInt(navigator.appVersion)>3) {
 if (navigator.appName=="Netscape") {
  winW = window.innerWidth;
 }
 if (navigator.appName.indexOf("Microsoft")!=-1) {
  winW = document.body.offsetWidth - 90;
 }
}

if (winW < 1) {
   winW = screen.width-90;
}

return winW;
}