var bmem = 0;
function mover(iname)
{
	if (bmem != iname)
	{
		document.images['button_'+iname].src = 'images/button_'+iname+'a.gif';
	}
}

function mout(iname)
{
	if (bmem != iname)
	{
		document.images['button_'+iname].src = 'images/button_'+iname+'.gif';
	}
}

function mclick(iname)
{
		document.images['button_'+iname].src = 'images/button_'+iname+'b.gif';
		bmem = iname;
}