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/* Acknowledgement: this is based on the Wikipedia table-of-contents
* toggle. */
var idCounter = 0;
function showTreeToggle(isHidden) {
if (document.getElementById) {
var id = "toggle_" + idCounter;
document.writeln(
'<a href="javascript:toggleTree(\'' + id + '\')" class="toggle" id="' + id + '">' +
'<span class="showTree" ' + (isHidden ? '' : 'style="display: none;"') + '>+</span>' +
'<span class="hideTree" ' + (isHidden ? 'style="display: none;"' : '') + '>-</span>' +
'</a>');
idCounter = idCounter + 1;
}
}
function toggleTree(id) {
var href = document.getElementById(id);
var node = href;
var tree = null;
while (node != null) {
if (node.className == "nesting") tree = node;
node = node.nextSibling;
}
node = href.firstChild;
var hideTree = null;
var showTree = null;
while (node != null) {
if (node.className == "showTree") showTree = node;
else if (node.className == "hideTree") hideTree = node;
node = node.nextSibling;
}
if (tree.style.display == 'none') {
tree.style.display = '';
hideTree.style.display = '';
showTree.style.display = 'none';
} else {
tree.style.display = 'none';
hideTree.style.display = 'none';
showTree.style.display = '';
}
}
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