// set up track array
var handleArr = new Object();
handleArr["track1"]=250; // set initial value
// set up style
var track1Span = new Fx.Style($('track1span'),'width',{duration:0});
var slider1 = new Slider($('track1'),$('handle1'),{
	steps:500,  // there are 250 steps in the track
	offset:0, // offset of zero fits the handle into the track
	onChange: function(pos){
		track1Span.set(pos);
		handleArr['track1'] = parseInt(pos); // store position
		updateTestDiv(); // run function to do something
	}
}).set(handleArr["track1"]); // set initial position
// function to update test tag with handle position
function updateTestDiv(pos){
	$('value').innerHTML = handleArr['track1'];
}