//쿠키 읽어오는 함수 
function getCookie(name)
{
	var first; 
	var str = name + "=";
	if(document.cookie.length > 0) {
		find = document.cookie.indexOf(str);
		if(find == -1) return null; 
		first = find + str.length;
		end = document.cookie.indexOf(";", first);
		if(end == -1) 
			end = document.cookie.length;
		return unescape(document.cookie.substring(first, end));
	}
}

// 쿠키를 설정하는 함수 
function setCookie(name, value, expireDate) 
{ 
	var cookieStr = name + "=" + escape(value) 
		+ ((expireDate == null)?"":(";expires = "+expireDate.toGMTString()));
	cookieStr += "; path=/";
	document.cookie = cookieStr; 
}