function showPhoto(url,w,h) {
	var str=""
	var _x = (screen.availWidth  - w) / 2;
	var _y = (screen.availHeight - h) / 2;

	str+="'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes,resizable=0,copyhistory=0,left=" + _x + ",top=" + _y + ",width=" + w + ",height=" + h + "'"
	photoWin = window.open(url,'photo',str);
	photoWin.resizeTo( w, h );
	photoWin.focus();
}