function winopen(url, w, h) {

	sizePrefix = "width="+w+",height="+h,",";
	imageWindow = window.open(url,"_item_view", sizePrefix+"top=20,left=20,resizable=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no,scrollbars=no");
	imageWindow.focus();
	imageWindow.resizeTo(w, h);

}