function open_win_viewer(url) {

windowprops = "top=100,"
			+ "left=100,"
			+ "toolbar=no,"
			+ "location=no,"
			+ "directories=no,"
			+ "menubar=no,"
			+ "copyhistory=yes,"
			+ "status=no,"
			+ "resizable=yes,"
			+ "scrollbars=yes,"
			+ "width=100,"
			+ "height=100";

page = "img_popup.php?img=" + url
win_area = window.open(page, "", windowprops);

if (!win_area.opener) win_area.opener = self;

} // end function