var whichAct=-1;
function unAct()
{
	if(whichAct!=-1) 
	{
		temp=left.document.images[whichAct].src;
		left.document.images[whichAct].src=left.document.images[whichAct].lowsrc;
		left.document.images[whichAct].lowsrc=temp
		whichAct=-1;
	}
}

function buttonAct(i)
{
	if(frames.length>1)
	{
		unAct();
		temp=left.document.images[i].src;
		left.document.images[i].src=left.document.images[i].lowsrc;
		left.document.images[i].lowsrc=temp
		whichAct=i;
	}
}