The easiest way would be to have a form with its action set to mailto: with the address you want it to send to. However this would rely on the user having an installed mail client such as outlook, and having it properly configured, and actually wanting to send the email. They could just as easily close the new mail window and be done with it.
If you want a more professional solution, any Server side language such as PHP or ASP is capable of sending emails. so you can use one of those to send it, and it doesn't rely on the user's mail client.
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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.