// horizontal slider control
		var slider1 = new Control.Slider('handle1', 'track1', {
			onSlide: function(v) { scrollHorizontal(v, $('slider'), slider1);  },
			onChange: function(v) { scrollHorizontal(v, $('slider'), slider1); }
		});

		// scroll the element horizontally based on its width and the slider maximum value
		function scrollHorizontal(value, element, slider) {
			element.scrollLeft  = Math.round(value/slider.maximum*(element.scrollWidth-element.offsetWidth));
		}

/** This is high-level function.
 * It must react to delta being more/less than zero.
 */
function handle(delta) 
{

		var element = $('slider');		
	    var pos = element.scrollLeft;

        if (delta < 0) // scroll ahead
		{
			pos = pos + 300;			
		}
        else //scroll back
		{
			pos = pos - 300;
			if(pos < 0) pos = 0;
		}
			
		if(pos >= 0 && pos <= element.scrollWidth)
		{			
			var handleOffset = pos / (element.scrollWidth-element.offsetWidth);
			slider1.setValue(handleOffset);					
		}
}

/** Event handler for mouse wheel event.
 */
function wheel(event){
        var delta = 0;
        if (!event) /* For IE. */
                event = window.event;
        if (event.wheelDelta) { /* IE/Opera. */
                delta = event.wheelDelta/120;
                /** In Opera 9, delta differs in sign as compared to IE.
                 */
                if (window.opera)
                        delta = -delta;
        } else if (event.detail) { /** Mozilla case. */
                /** In Mozilla, sign of delta is different than in IE.
                 * Also, delta is multiple of 3.
                 */
                delta = -event.detail/3;
        }
        /** If delta is nonzero, handle it.
         * Basically, delta is now positive if wheel was scrolled up,
         * and negative, if wheel was scrolled down.
         */
        if (delta)
                handle(delta);
        /** Prevent default actions caused by mouse wheel.
         * That might be ugly, but we handle scrolls somehow
         * anyway, so don't bother here..
         */
        if (event.preventDefault)
                event.preventDefault();
	event.returnValue = false;
}

/** Initialization code. 
 * If you use your own event management code, change it as required.
 */
if (window.addEventListener)
        /** DOMMouseScroll is for mozilla. */
        window.addEventListener('DOMMouseScroll', wheel, false);
	/** IE/Opera. */
	window.onmousewheel = document.onmousewheel = wheel;