function set_cookie(name, value, expirehours, domain) 
    {
        var today = new Date();
        today.setTime(today.getTime() + (60*60*1000*expirehours));
        document.cookie = name + "=" + escape( value ) + "; path=/; expires=" + today.toGMTString() + ";";
      /*  if (domain) {
            document.cookie += "domain=" + domain + ";";
			alert(document.cookie);
        }*/
    }
	
	// 쿠키 얻음
    function get_cookie(name) 
    {
		//alert("name:"+name);
        var find_sw = false;
        var start, end;
        var i = 0;

        for (i=0; i<= document.cookie.length; i++)
        {
            start = i;
            end = start + name.length;

            if(document.cookie.substring(start, end) == name) 
            {
                find_sw = true
                break
            }
        }

        if (find_sw == true) 
        {
            start = end + 1;
            end = document.cookie.indexOf(";", start);

            if(end < start)
                end = document.cookie.length;

            return document.cookie.substring(start, end);
        }
        return "";
    }

    // 쿠키 지움
    function delete_cookie(name) 
    {
        var today = new Date();

        today.setTime(today.getTime() - 1);
        var value = get_cookie(name);
        if(value != "")
            document.cookie = name + "=" + value + "; path=/; expires=" + today.toGMTString();
    }