//Lafox.Net 2008; Oleg Tsymaenko tsyma[at]lafox.net

function get_itm(id){
    var itm = null;
    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 changeDiv(id, method){
    var itm = get_itm(id);
    if (itm.style){
        if ( method == "show" ){
            itm.style.display = "";
        }else{
            itm.style.display = "none";
        }
    }else{
        itm.visibility = "show";
    }
}

function invertDiv(id){
    var itm = get_itm(id);
    if (itm.style.display==""){
        changeDiv(id,"none");
    }else{
        changeDiv(id,"show");
    }
}