// Content 	: 다음 도메인을 확인하여 유효한 영구쿠키를 발급
// Date 	: 2005.02.28
// Update	: makePCookie.jsp 파일을 js 파일로 변경
//                  도메인 체크하는 부분 필요없다고 해서 삭제함

function Nethru_getCookieVal(offset)
{
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
		endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

function Nethru_SetCookie(name, value)
{
  	var argv = Nethru_SetCookie.arguments;
   	var argc = Nethru_SetCookie.arguments.length;
   	var expires = (2 < argc) ? argv[2] : null;
   	var path = (3 < argc) ? argv[3] : null;
   	var domain = (4 < argc) ? argv[4] : null;
   	var secure = (5 < argc) ? argv[5] : false;
   	

  	document.cookie = name + "=" + escape (value)
  	                                + ((expires == null) ? "" : ("; expires="+expires.toGMTString()))
  	                                + ((path == null) ? "" : ("; path=" + path))
  	                                + ((domain == null) ? "" : ("; domain=" + domain))
  	                                + ((secure == true) ? "; secure" : "");
}

function Nethru_GetCookie(name)
{
   	var arg = name + "=";
   	var alen = arg.length;
   	var clen = document.cookie.length;
   	var i = 0;
   	
   	while (i < clen) {
      		var j = i + alen;
      		if (document.cookie.substring(i, j) == arg)
         			return Nethru_getCookieVal (j);
         			
      		i = document.cookie.indexOf(" ", i) + 1;
      		if (i == 0)
         			break;
      	}
      	
  	return null;
}

function Nethru_makePersistentCookie(name,length,path,domain)
{
    	var today = new Date();
    	var expiredDate = new Date(2020,1,1);
    	var cookie;
	var value;
		

    	cookie = Nethru_GetCookie(name);
    	if ( cookie ) {		//이미 존재하는지 확인
        		return 1;
	}
	
	

	//random 함수에서 10 digit 을 가져온다... 단 random 함수의 seed가 time이라고 하는데
	//이 부분때문에 unique 보장 확율이 좀 떨어진다.
	var values = new Array();
	for ( i=0; i < length ; i++ ) {
		values[i] = "" + Math.random();
	}

	value = today.getTime();

	// use first decimal
	for ( i=0; i < length ; i++ ) {
		value += values[i].charAt(2);
	}
	Nethru_SetCookie(name,value,expiredDate,path,domain);
}

function Nethru_getDomain() {
	var _host   = document.domain;
	var so = _host.split('.');
	var dm  = so[so.length-2] + '.' + so[so.length-1];
	
	return (so[so.length-1].length == 2) ? so[so.length-3] + '.' + dm : dm;
}

var Nethru_domain  = Nethru_getDomain();

Nethru_makePersistentCookie("DNSHOPCPC",10,"/",Nethru_domain);

<!--
var pm_tagname = "universalTag.txt";
var pm_tagversion = "1.4";
var pm_accountid = "GIBLE8BRMUSEGM2B78CVG78KJ4";
var pm_scripthost = "srv.perf.overture.com";
var pm_customargs = "";
var pm_querystr = "?" + "ver=" + pm_tagversion + "&aid=" + pm_accountid + pm_customargs;
var pm_tag = "<SCR" + "IPT LANGUAGE='JavaScript' " + "SRC=//" + pm_scripthost + "/collweb/ScriptServlet" + pm_querystr + "></SCR" + "IPT>";
//document.write(pm_tag);
// -->