var winW = 630, winH = 460;
if (parseInt(navigator.appVersion)>3) {
 if (navigator.appName=="Netscape") {
  winW = window.innerWidth-16;
  winH = window.innerHeight-16;
 }
 if (navigator.appName.indexOf("Microsoft")!=-1) {
  winW = document.body.offsetWidth-20;
  winH = document.body.offsetHeight-20;
 }
}
var screenWidthStart = (winW - 800)/2; 
if (IsMenuLeft) {
	screenWidthStart = 0 }
if (screenWidthStart < 0) {
	screenWidthStart = 0}