function select_block(block)
{
        if(block=="catoblako")
        {
                if (document.getElementById("catoblako").style.display == 'none')
                {
                        document.getElementById("catoblako").style.display = 'block';
                        document.getElementById("catlist").style.display = 'none';
                        save_collapsed("catoblako", true);
                        save_collapsed("catlist", false);
                }
        }else if(block=="catlist"){
                if (document.getElementById("catlist").style.display == 'none')
                {
                        document.getElementById("catlist").style.display = 'block';
                        document.getElementById("catoblako").style.display = 'none';
                        save_collapsed("catlist", true);
                        save_collapsed("catoblako", false);
                }

        }
}


function save_collapsed(objid, addcollapsed)
{
        var collapsed = get_cookie("collapse");
        var tmp = "";

        if (collapsed != null)
        {
                collapsed = collapsed.split(",");

                for (i in collapsed)
                {
                        if (collapsed[i] != objid && collapsed[i] != "")
                        {
                                tmp = tmp + collapsed[i];
                                tmp = tmp + ",";
                        }
                }
        }

        if (addcollapsed)
        {
                tmp = tmp + objid;
        }

        expires = new Date();
        expires.setTime(expires.getTime() + (1000 * 86400 * 365));
        set_cookie("collapse", tmp, expires);
}

function set_cookie(name, value, expires)
{
        if (!expires)
        {
                expires = new Date();
        }
        document.cookie = name + "=" + escape(value) + "; expires=" + expires.toGMTString() +  "; path=/";
}

function get_cookie(name)
{
        cookie_name = name + "=";
        cookie_length = document.cookie.length;
        cookie_begin = 0;
        while (cookie_begin < cookie_length)
        {
                value_begin = cookie_begin + cookie_name.length;
                if (document.cookie.substring(cookie_begin, value_begin) == cookie_name)
                {
                        var value_end = document.cookie.indexOf (";", value_begin);
                        if (value_end == -1)
                        {
                                value_end = cookie_length;
                        }
                        return unescape(document.cookie.substring(value_begin, value_end));
                }
                cookie_begin = document.cookie.indexOf(" ", cookie_begin) + 1;
                if (cookie_begin == 0)
                {
                        break;
                }
        }
        return null;
}