rem: var position = event.page[this.axis] - this.element.getRelativePosition()[this.axis] - this.knob[offset] / 2; 
add: var position = event.page[this.axis] - this.element.getRelativePosition()[this.axis] - this.half; 
context: 	clickedElement: function(event){		var position = event.page[this.axis] - this.element.getRelativePosition()[this.axis] - this.knob[offset] / 2;		position = position.limit(-this.options.offset, this.max -this.options.offset);		this.step = this.toStep(position);		this.checkStep();		this.end();		this.fireEvent('onTick', position);	},
meta: 9980	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9980/9942f8fbf761906eb05df14cf25ab2da5d2f07fd/Slider.js/clean/Source/Plugins/Slider.js