SliderGroup
by Paul Jungwirth

Groups sliders from jQuery UI so they always add up to a given amount.

SliderGroup assumes that each slider <div> is followed by another <div> for 
storing/displaying the slider's current value.

You should have HTML like below:

    <div class="slider" style="width:250"></div>
    <div class="slider-counter">25</div>
    <p>
    <div class="slider" style="width:250"></div>
    <div class="slider-counter">25</div>
    <p>
    <div class="slider" style="width:250"></div>
    <div class="slider-counter">50</div>

To turn this into a slider group, include jquery and jquery-ui, then execute 
this javascript:

    $(function() {
        SliderGroup(".slider", 0, 100).init();
    });