code: function getScrollBarWidth() {
  		var width = 0, div = createElement("div", { class: "scrollbar-measure" });
  		
  		style(div, {
  			width: 100,
  			height: 100,
  			overflow: "scroll",
  			position: "absolute",
  			top: -9999
  		});
  
  		document.body.appendChild(div);
  		width = div.offsetWidth - div.clientWidth;
  		document.body.removeChild(div);
  
  		return width;
  	}
docs: Get native scrollbar width
  @return {Number} Scrollbar width