function rollOvr0(e){rollOver(document.getElementById('prev'))}
function rollOff0(e){rollOff(document.getElementById('prev'))}
function rollOvr1(e){rollOver(document.getElementById('oidx'))}
function rollOff1(e){rollOff(document.getElementById('oidx'))}
function rollOvr2(e){rollOver(document.getElementById('next'))}
function rollOff2(e){rollOff(document.getElementById('next'))}

function rollOver(el){el.style.backgroundPositionY = '0px'}
function rollOff(el){el.style.backgroundPositionY = '-35px'}

function addListeners(e)
	{
	var dv0 = document.getElementById('prev');
	var dv1 = document.getElementById('oidx');
	var dv2 = document.getElementById('next');

	addEvent(dv0, 'mouseover', rollOvr0, false);
	addEvent(dv1, 'mouseover', rollOvr1, false);
	addEvent(dv2, 'mouseover', rollOvr2, false);

	addEvent(dv0, 'mouseout', rollOff0, false);
	addEvent(dv1, 'mouseout', rollOff1, false);
	addEvent(dv2, 'mouseout', rollOff2, false);
	}

function addEvent(elm, evType, fn, useCapture)
	{
	// Add event listeners
	if (elm.addEventListener)
		{
		elm.addEventListener(evType, fn, useCapture);
		return true;
		}
	else
		if (elm.attachEvent)
			{
			var r = elm.attachEvent('on' + evType, fn);
			return r;
			}
		else
			{
			elm['on' + evType] = fn;
			}
		return false;
		}

addEvent(window, 'load', addListeners, false);