{
var rangeX = document.querySelector('#rangeX');
var h = 500;
rangeX['oninput' in rangeX ? 'oninput' : 'onchange'] = slide;
function slide(){
var barH = h * rangeX.value;
var bar = d3.select("#bar");
bar.transition()
.attr("y", h - barH)
.attr("height", barH)
}
}