The above example shows how to use onClientChange handler to get onChange event
The Sample is initialized with this code.
<script>
function onContentsChange() {
alert('contents changed');
}
</script>
<asp:TextBox runat="server"
ID="txtBox1"
TextMode="MultiLine"
Columns="50"
Rows="10"
Text="Hello <b>world!</b>" />
<ajaxToolkit:HtmlEditorExtender
ID="htmlEditorExtender1"
TargetControlID="txtBox1"
OnClientChange="onContentsChange"
runat="server" >
</ajaxToolkit:HtmlEditorExtender>
