// ver 1.0
var PICSHL_IDHEAD = "pn_picli";
var PICNUM_IDHEAD = "pn_picnum";
var LAST_PICSHL = "pn_picli1";
var COLOR_ON = "#404040";
var COLOR_OFF = "#C0C0C0";

function picNumOver(_oPicNum) {
	var oLastPicShl = document.getElementById(LAST_PICSHL);
	var sLastPicNumId = LAST_PICSHL.replace(PICSHL_IDHEAD, PICNUM_IDHEAD);
	var oLastPicNum = document.getElementById(sLastPicNumId);
	
	var sNowPicShlId = _oPicNum.id.replace(PICNUM_IDHEAD, PICSHL_IDHEAD);
	var oNowPicShl = document.getElementById(sNowPicShlId);
	
	oLastPicShl.style.display = "none";
	changeBackImgO(oLastPicNum, "n"),
	oLastPicNum.style.color=COLOR_OFF;
	
	oNowPicShl.style.display = "block";
	changeBackImgO(_oPicNum, "y"),
	_oPicNum.style.color= COLOR_ON;
	
	LAST_PICSHL = sNowPicShlId;
}