function getItem(id)
    {
        var itm = false;
        if(document.getElementById)
            itm = document.getElementById(id);
        else if(document.all)
            itm = document.all[id];
        else if(document.layers)
            itm = document.layers[id];

        return itm;
    }

    function toggle(id)
    {
        itm = getItem(id);

        itma = id+'a';


        if(!itm)
            return false;

        if(itm.style.display == 'none')
            {
            itm.style.display = 'block';
		document.getElementById(itma).innerHTML = '-';
            }


        else
            {
            itm.style.display = 'none';
		document.getElementById(itma).innerHTML = '+';
            }

        return false;
    }