function toRight() {
    newEntry = new Option(document.getElementById("left").value, document.getElementById("left").value, false, true);
    document.getElementById("right").options[document.getElementById("right").length] = newEntry;
    document.getElementById("left").options[document.getElementById("left").selectedIndex] = null;

        rewriteUsers();
}

function toLeft() {
    newEntry = new Option(document.getElementById("right").value, document.getElementById("right").value, false, true);
    document.getElementById("left").options[document.getElementById("left").length] = newEntry;
    document.getElementById("right").options[document.getElementById("right").selectedIndex] = null;
    
    rewriteUsers();
}

function rewriteUsers() {
    users = "";
    i = 0;
    for ( i=0; i < document.getElementById("right").length;i++) {
        users += document.getElementById("right").options[i].value + ":";
    }
    document.getElementById("users").value = users;
}    

function doTimeAct (day, pck, elem) {
    document.getElementById('package').value=pck; 
    document.getElementById('day').value=day; 
    document.getElementById('time').value= document.getElementById(elem).value;     
    document.getElementById('formtime').submit()    
}