var popWin = null;
var WinCount = 0;
var WinName = "popWin";

function openTour(site){
	var url = "../" + site + "/tour.html";
	closeWin();
    WinName = "VRTour";
    popWin = window.open(url, WinName,"toolbar=no,scrollbars=no,resizable=no,menubar=no,statusbar=no,locationbar=no,navigationbar=no,personalbar=no,width=960,height=695,top=0,left=0");
	popWin.focus();
}

function openPres(site){
	var url = "../" + site + "/class.html"
	closeWin();
    WinName = "VRPres";
   	popWin = window.open(url, WinName,"toolbar=no,scrollbars=no,resizable=no,menubar=no,statusbar=no,locationbar=no,navigationbar=no,personalbar=no,width=960,height=695,top=0,left=0");
	popWin.focus();
}

function openBlog(){
	closeWin();
    WinName = "blog";
    popWin = window.open("http://virtualworldproject.blogspot.com", WinName,"");
	popWin.focus();
}

function closeWin(){
  if (navigator.appName != "Microsoft Internet Explorer" 
      || parseInt(navigator.appVersion) >=4) //do not close if early IE
    if(popWin != null) if(!popWin.closed) popWin.close() 
}