url: http://ui.jquery.com/demos/slider/default.html

$.widget.prototype._setData has no properties

_setData()("value", 1)ui.slider.js (line 382)

_slide()(Object originalEvent=Event mousemove type=mousemove, 0, 1)ui.slider.js (line 326)

_mouseDrag()(Object originalEvent=Event mousemove type=mousemove)ui.slider.js (line 234)

_mouseMove()(Object originalEvent=Event mousemove type=mousemove)ui.core.js (line 482)

_mouseMoveDelegate()(Object originalEvent=Event mousemove type=mousemove)ui.core.js (line 457)

handle()(Object originalEvent=Event mousemove type=mousemove)jquery-1.3.1.js (line 2577)

(?)()()jquery-1.3.1.js (line 2353)

[Break on this error] $.widget.prototype._setData.apply(this, arguments);