var leftStopPoint="null";
	var layerRef="null",layerStyleRef="null",styleSwitch="null";
	var currLeft=0;
        
function initBack()
{
	if (navigator.appName == "Netscape")
	{
	layerStyleRef="layer.";
	layerRef="document.layers";
	styleSwitch="";
	leftStopPoint=-552;
	}
	else
	{
	layerStyleRef="layer.style.";
	layerRef="document.all";
	styleSwitch=".style";
	leftStopPoint="-552px";
	}
	moveLayerLeft('movingBG');
}

function moveLayerLeft(layerName)
{ 
	if (eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.left != leftStopPoint'))
	{
	currLeft-=1;
	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.left = currLeft');
	setTimeout('moveLayerLeft("'+layerName+'")',30);
	}
	else
	{
	currLeft=1;
	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.left = currLeft');
	setTimeout('moveLayerLeft("'+layerName+'")',30);
	}
}