table_contract = new Image(1,1);
table_contract.src = "../graphics/plus_norg.gif";
table_expand = new Image(1,1);
table_expand.src = "../graphics/minus_norg.gif";

function show(it) {
what  = eval(it + "Menu");
where = eval(it + "Image");
if (what.style.display == "none") {
what.style.display = "";
where.src = table_expand.src;

} else {
what.style.display = "none";
where.src = table_contract.src;

}
}

function hide(it) {
what  = eval(it + "Menu");
where = eval(it + "Image");
if (what.style.display == "") {
what.style.display = "none";
where.src = table_contract.src;
}
}