(function($) { $(document).ready(function() { $('ul.SelectionGroup input.selector').livequery('click', function(){ var prnt = this.parentNodeWithTag('ul'); var li = this.parentNodeWithTag('li'); var i, item, allItems = prnt.childNodes; for(i=0;item=allItems[i];i++) if(item.tagName) { if(item == li) { Element.addClassName(item, 'selected') } else { Element.removeClassName(item, 'selected') } } }); }) })(jQuery); SelectionGroupSelector = Class.create(); SelectionGroupSelector.prototype = { parentNodeWithTag: function(tagName){ var el = this.parentNode; while(el.parentNode && el.tagName.toLowerCase() != tagName) el = el.parentNode; return el; } } SelectionGroupSelector.applyTo('ul.SelectionGroup input.selector');