var last_expanded = '';
function showHide(id)
{
var obj = document.getElementById(id);
var status = obj.className;
if (status == 'hide') {
if (last_expanded != '') {
var last_obj = document.getElementById(last_expanded);
last_obj.className = 'hide';
}
obj.className = 'show';
last_expanded = id;
} else {
obj.className = 'hide';
}
}