// TODO: expand/collapse (show/hide) an element, specified by id,
// triggered by an element, specified by triggerID. triggerTxt is a text in trigger element.
function toggle(id, triggerId){
e = document.getElementById(id);
trigger = document.getElementById(triggerId);

if (e.style.display == ' none' || e.style.display != 'none')
{
e.style.display = 'none'
}
else
{
e.style.display = 'block'
}
}