function popup(file) {
		a_int_windowWidth = 450; a_int_windowHeight = 220;
		a_str_windowURL = file;
		var int_windowLeft = (screen.width - a_int_windowWidth) / 2;
		var int_windowTop = (screen.height - a_int_windowHeight) / 2;
		var str_windowProperties = 'height=' + a_int_windowHeight + ',width=' + a_int_windowWidth + ',top=' + int_windowTop + ',left=' + int_windowLeft + ',scrollbars=true,resizable=false,menubar=false,toolbar=false,location=false,statusbar=false,fullscreen=false';
		var obj_window = window.open(a_str_windowURL, 'news', str_windowProperties)
		if (parseInt(navigator.appVersion) >= 4) {
			obj_window.window.focus();
		}
	}