Create jQuery Slider Range With One Handle Not Using Min/Max

Is there any possible way to create a slider that will create a range similar to what is done with one handle using min/max, only instead of min/max, starting the range from say 50 (on a scale from 1-100)? I realize this will most likely require modification of the slider or creating a plugin, just wondering if anyone has done this already or knows how to go about it.

I.e. something like this: http://jqueryui.com/demos/slider/rangemin.html

Only, instead of the range going from the min, going off of where the handle is, and allowing the user to slide either left or right of that fixed starting point to开发者_StackOverflow社区 create the range. Any help is appreciated, and I'd be glad to clarify what I need if that doesn't make sense! :)

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I'm not sure I understand the question. You want something (what?) to be based on the initial position of the slider "thumb"???