In code behind u close model popup like this

Response.Write("&lt;script type='text/javascript'&gt;window.frameElement.commitPopup();&lt;/script&gt;");
                      Response.Flush();
                      Response.End();


I hope u use application page otherwise u not get Response object

How to close a modal using javascript from code behind?
I read that lens makers used to use radioactive glass to increase the refractive index property of their lenses.

How radioactive are they?

Here are some example dosages; where would looking through the viewfinder for an hour fit?

http://xkcd.com/radiation/



