//-----------------> Courses.aspx <------------------

//var selectedEventID; <--- DECLARED IN .aspx CODE

function changeEvent(newSelectedEventID) 
{
    try {
        remove(selectedEventID);
    }
    catch (e) {
    }
    finally {
        show(newSelectedEventID);
        selectedEventID = newSelectedEventID;
    }
}



function remove(object) {
    document.getElementById(object).style.display = "none";
}

function show(object) {
    document.getElementById(object).style.display = "inline";
}