function layer_over() {
	$('subMenuZone').style.overflowX = "";
	$('subMenuZone').style.overflowY = "auto";
	$('subMenuZone').style.border = "1px solid #eeeeee";
	$('subMenuZone').style.background = "white";
}
function layer_out() { //v3.0
	$('subMenuZone').style.overflowX = "hidden";
	$('subMenuZone').style.overflowY = "hidden";
	$('subMenuZone').style.border = "1px solid #FFFFFF";
	$('subMenuZone').style.background = "";
}