jQuery-UI slider up down buttons

Didn't find the way to create up and down buttons for vertical slider, to make its appearance like as standard scroller.

Is solution below suitable? Or are there any other ways?

function scroll(step)
{

    if (step > 0)
    {
        if ($("#slider").slider('value') <= (100开发者_JAVA百科 - step))
        {
            $("#slider").slider('value', $("#slider").slider('value') + step);
        }
    }
    else
    {
        if ($("#slider").slider('value') >= Math.abs(step))
        {
            $("#slider").slider('value', $("#slider").slider('value') + step);
        }       
    }


    return false;   
}

What you have certainly works...but if you're worried about the range capping, slider already does this internally, so you can just do this:

function scroll(step) {
  var s = $("#slider");
  s.slider('value', s.slider('value') + step);
  return false;   
}

Also note that even setting the value returns it (the capped value), so you can do this for example:

function scroll(step) {
  var s = $("#slider");
  var newValue = s.slider('value', s.slider('value') + step);
  alert("The new value is: " + newValue);
  return false;   
}

So for example if the range is 0-100 and you're at 90, a step of 10 or more would always result in a newValue of 100.