Range slider w/ 2 handles, but need one readonly

Range slider w/ 2 handles, but need one readonly

So the way it works is I have one fixed-min slider (0 - 2000), and after that comes a two-handle range slider (same range, 0 - 2000). The minimum starting value of the second slider comes from the value you get in the first fixed-min slider. What I need is for the min value of that second slider to be read-only.

The fiddle makes it a little more clear:

http://jsfiddle.net/Jackpot/8fe3rn3f