function toggle(mid) 
{
    var obj=document.getElementById('mem'+mid);
    var toggle = document.getElementById('toggle' + mid);
    var arrow = document.getElementById('arrow' + mid);

    if (obj.style.display == "block")
    {
        obj.style.display = "none";
        toggle.innerHTML = "Show trading styles";
        arrow.innerHTML = "v";
    }
    else
    {
        obj.style.display = "block";
        toggle.innerHTML = "Hide trading styles";
        arrow.innerHTML = "^";
    }

}