asp.net lightbox jquery

I am using a lightbox to show a form which sends the email from the codebehind (.cs file) however I see that in the lightbox whenever i click the [Send] button, the debug point is not hit. can anyone suggest me a lightbox effect example or already implemented lightbox in asp.net so that i can plug in that and i can send the email.

Moreover I think that i should not use javascript to send the email becuase it uses my passwords as well e.g

Dim MailCreds As New System.Net.NetworkCredential("sitemgr@something.com", "password")

please help!