function setSubWinName(_st){
	var _n = (_st) ? _st : "sub";
	window.name = _n;
}

function openMainWin(_tar, _win){
	var wObj;
	var _w = (_win) ? _win : "sub";
	wObj = window.open(_tar.href,_w);
	wObj.focus();
	return false;
}

function changeParURL(_tar){
	bCheck = CheckParWin();
	
	if(bCheck){
		window.opener.focus();
		window.opener.location.href = _tar.href;
	}else{
		return openMainWin(_tar, "main");
	}
	return false;
}


function CheckParWin(){
	if ((navigator.userAgent.indexOf("Mac") > -1)){
		if (window.opener){
			bOpen = true;
		}else{
			bOpen = false;
		}
	}else{
		if (window.opener&&!window.opener.closed){
			bOpen = true;
		}else{
			bOpen = false;
		}
	}
	return bOpen;
}