bro =  navigator.appName.substr(0,3).toLowerCase();
ver = navigator.appVersion.substr(0,1).toLowerCase();
ch = bro + ver;

if (ch == "net4") {
	w = (window.innerWidth - 770)/2;
	h = window.innerHeight;
        } else {
	        if (ch == "net5") {
		w = (window.innerWidth - 770)/2;
		h = window.innerHeight;
	        } else {
		w = (document.body.clientWidth - 770)/2;
		h = document.body.clientHeight;
		}
}