function openwindow(url,w,h){
	x=screen.width/2-w/2;
	y=screen.height/2-h/2;
	win=window.open(url,'gallery','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=300,height=200');
	win.moveTo(0,0);
}

function openguestbook()
{
sub = window.open("contents5.html","guestbook","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=350,height=400,left=0,top=0");
}