How can I delete my own comment?

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I accidentally posted the same comment on an image several times . Loading the next page was taking logger than usual so clicked on add comment multiple times and when the next page loaded I discovered that I had posted the same comment about six times. This has happened before to me I posted two responses on a discussion by accidentally double clicking on "post response" . Now that's bugging me because I think that's against community guide lines and if I delete them my self then it may not be a problem.any suggestions? on the other hand if it can't be done then don't you think such a feature should be added? Or any body else has had a similar problem ? It really isn't much of a problem for me either , I mean it just happened twice but then again It hasn't been a long time since I joined the site I don't wanna get banned.