Getting a widget to click through to an external site?

Hi. I have a widget that displays a graphic image that is updated from my website. The widget is at http://www.widgetbox.com/widget/atmos.... I want people to be able to click on the widget and then go to my website, http://co2now.org for more information about current CO2 levels and trends. At present, when someone clicks on the widget, the home page at http://co2now.org opens up inside the 200 x 300 pi widget. Is there a way to write the code so the widget does what I want?