function ToggleSched(sender, id){
    var hiddenRow = document.getElementById(id);

    var displayProp = (document.all)?'block':'table-row';

    if(hiddenRow.style.display != displayProp){
        hiddenRow.style.display = displayProp;
        sender.innerHTML = "[-]";
    }else{
        hiddenRow.style.display = 'none';
        sender.innerHTML = "[+]";
    }
}