function crossUpdate ( value, slider ) {

	// If the sliders aren't interlocked, don't
	// cross-update.
	if ( !lockedState ) return;

	// Select whether to increase or decrease
	// the other slider value.
	var a = slider1 === slider ? 0 : 1;
	
	// Invert a
	var b = a ? 0 : 1;

	// Offset the slider value.
	value -= lockedValues[b] - lockedValues[a];

	// Set the value
	slider.noUiSlider.set(value);
}
