function popup(u,n,w,h,l,t,c,f) {
	var x=((screen.width-w)/2);
	if(c==1){l=x;t=(screen.height-h)/2;}
	f+=',height='+h+',width='+w+',top='+t+',left='+l;
	LvlWin=window.open(u,n,f);
	LvlWin.focus();
}