function setScroller(scrollpaneid, scrollcontentid) {

//change the main div to overflow-hidden as we can use the slider now
$('#'+scrollpaneid).css('overflow','hidden');

//compare the height of the scroll content to the scroll pane to see if we need a scrollbar
var pheight = $('#'+scrollpaneid).height();
var cheight = $('#'+scrollcontentid).height();

var difference = parseInt(cheight - pheight); 
if (difference < 0) difference = 1;
   
var proportion = difference / cheight;//eg 200px/500px
   var handleHeight = Math.round((1-proportion)*pheight);//set the proportional height - round it to make sure everything adds up correctly later on
   handleHeight -= handleHeight%2; 

   $('div#'+scrollpaneid+'-wrap').remove(); // removing the existing div
   $("#"+scrollpaneid).after('<\div id="'+scrollpaneid+'-wrap"><\div id="'+scrollpaneid+'-vertical"><\/div><\/div>');//append the necessary divs so they're only there if needed
   $("#"+scrollpaneid+"-wrap").height(pheight);//set the height of the slider bar to that of the scroll pane

   //set up the slider 
   $('#'+scrollpaneid+'-vertical').slider({
      orientation: 'vertical',
      min: 0,
      max: 100,
      value: 100,
      slide: function(event, ui) {//used so the content scrolls when the slider is dragged
         var topValue = -((100-ui.value)*difference/100);
         $('#'+scrollcontentid).css({top:topValue});//move the top up (negative value) by the percentage the slider has been moved times the difference in height
      },
      change: function(event, ui) {//used so the content scrolls when the slider is changed by a click outside the handle or by the mousewheel
         var topValue = -((100-ui.value)*difference/100);
         $('#'+scrollcontentid).css({top:topValue});//move the top up (negative value) by the percentage the slider has been moved times the difference in height
      }
   });

   //set the handle height and bottom margin so the middle of the handle is in line with the slider
   $("#"+scrollpaneid+"-vertical a.ui-slider-handle").css({height:handleHeight,'margin-bottom':-0.5*handleHeight});
	
   var origSliderHeight = $("#"+scrollpaneid+"-vertical").height();//read the original slider height
   var sliderHeight = origSliderHeight - handleHeight ;//the height through which the handle can move needs to be the original height minus the handle height
   var sliderMargin =  (origSliderHeight - sliderHeight)*0.5;//so the slider needs to have both top and bottom margins equal to half the difference
   $("#"+scrollpaneid+"-wrap .ui-slider").css({height:sliderHeight,'margin-top':sliderMargin});//set the slider height and margins
   


$("#"+scrollpaneid+"-wrap .ui-slider").click(function(event){//stop any clicks on the slider propagating through to the code below
   	event.stopPropagation();
   });
   
$("#"+scrollpaneid+"-vertical").click(function(event){//clicks on the wrap outside the slider range
	  var offsetTop = $(this).offset().top;//read the offset of the scroll pane
	  var clickValue = (event.pageY-offsetTop)*100/$(this).height();//find the click point, subtract the offset, and calculate percentage of the slider clicked
	  $("#"+scrollpaneid+"-vertical").slider("value", 100-clickValue);//set the new value of the slider
}); 
	 
//additional code for mousewheel
$("#"+scrollpaneid+",#"+scrollpaneid+"-wrap").mousewheel(function(event, delta){
	var speed = 5;
	var sliderVal = $("#"+scrollpaneid+"-vertical").slider("value");//read current value of the slider
	
	sliderVal += (delta*speed);//increment the current value

	$("#"+scrollpaneid+"-vertical").slider("value", sliderVal);//and set the new value of the slider
	
	event.preventDefault();//stop any default behaviour
});

}