function setCookie(name,value,expiredays){
	var			argv				= setCookie.arguments;
	var			argc				= setCookie.arguments.length;
	var			path				= (3<argc) ? argv[3] : '/';
	var			domain			= (4<argc) ? argv[4] : null;
	var			secure			= (5<argc) ? argv[5] : false;
	var			todayDate		= new Date();
	todayDate						= new Date(todayDate.getYear(), todayDate.getMonth(), todayDate.getDate()+expiredays, 0,0,0);
	document.cookie			=	name+ "=" +value+
												(expiredays==null ? "" : "; expires=" +todayDate.toGMTString())+
												("; path=" +path)+
												(domain==null ? "" : "; domain="	+domain)+
												(secure==true ? "; secure" : "");
}

function getCookie(name){
	var			cname				= name+"=";
	var			dc					= document.cookie;
	if(dc.length>0){
		begin							= dc.indexOf(cname);
		if(begin!=-1){
			begin						+= cname.length;
			end							= dc.indexOf(";",begin);
			if(end==-1)
				end						= dc.length;
			return unescape(dc.substring(begin, end));
		}
	}
	return null;
}

function clearCookie(name) {
	var			today				= new Date()
	var			expire_date	= new Date(today.getTime() - 60*60*24*1000)
	document.cookie			= name + "= " + "; expires=" + expire_date.toGMTString()
}

function setCookieId(str) {
    expired_date			= 4380; // 4380 = 365 * 12 (2009~2020)
    setCookie("Cid",str,expired_date,"/","sky72.com",false);
}