How to delete an array of object entry?

How to delete an array of object entry?

Hi,
I'm trying to delete an item of a collection (is that the real name of it?) and I can't find how do it.
The JsFiddle page :  http://jsfiddle.net/hsolatges/c8YVH/

The user enter some new series ({serie: myseriename, data: mydata}). Flot replot the graph. How make possible for the user to delete any of those series and update the graph ?

The newbie I am can't find a nice way to search in my data array (dt) and delete the right entry.

Thanks !

PS : what is the name of the object { {serie: myseriename0, data: mydata0},  {serie: myseriename1, data: mydata1}, ...}