function openWindow(url,w,h,t) {
	sw=screen.availWidth/2-w/2;
	sh=screen.availHeight/2-h/2;
	window.open(url,t,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width='+w+',height='+h+',top='+sh+',screenY='+sh+',left='+sw+',screenX'+sw);
}
function openBooklet(url,w,t) {
	sw=screen.availWidth/2-w/2;
	sh=screen.availHeight;
	window.open(url,t,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width='+w+',height='+h+',top='+sh+',screenY='+sh+',left='+sw+',screenX'+sw);
}