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