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);
}