onActive/onBeforeActive events

</> Source
<!DOCTYPE html>
	<title>onActive/onBeforeActive events</title>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
	<link rel="stylesheet" type="text/css" href="../../../codebase/fonts/font_roboto/roboto.css"/>
	<link rel="stylesheet" type="text/css" href="../../../codebase/dhtmlx.css"/>
	<script src="../../../codebase/dhtmlx.js"></script>
		div#accObj {
			position: relative;
			width: 360px;
			height: 400px;
			box-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.09);
		#log_here {
			position: relative;
			width: auto;
			height: 180px;
			padding: 2px;
			border: 1px solid #dfdfdf;
			font-family: Roboto, Arial, Helvetica;
			font-size: 14px;
			color: #404040;
			margin-top: 10px;
			overflow: auto;
		var myAcc;
		var eventIndex = 1;
		function doOnLoad() {

			myAcc = new dhtmlXAccordion({
				parent: "accObj",
				items: [
					{id: "a", text: "Cell a"},
					{id: "b", text: "Cell b"},
					{id: "c", text: "Cell c"}

			myAcc.attachEvent("onBeforeActive", function(id){
				log("onBeforeActive event, cell: "+id);
				return true;
			myAcc.attachEvent("onActive", function(id){
				log("onActive event, cell: "+id);

		function log(text) {
			var t = document.getElementById("log_here");
			t.innerHTML += (eventIndex++)+") "+text+"<br>";
			t.scrollTop = t.scrollHeight;
<body onload="doOnLoad();">
	<div id="accObj" style="position: relative; width: 320px; height: 400px;"></div>
	<div id="log_here"></div>


Check documentation to learn how to use the components and easily implement them in your applications.